ANKARA, Turkey -- Activists on Wednesday presented a list of demands they said could end days of anti-government demonstrations that have engulfed Turkey, as police detained 25 people they accused of using social media to stoke the outpouring of anger.

In a move to defuse the tension, the deputy prime minister met with a group whose attempt to prevent authorities from ripping up trees in Istanbul's landmark Taksim Square has snowballed into nationwide protests against what demonstrators see as Prime Minister Recep Tayyip Erdogan's increasingly authoritarian rule.

Police have deployed water cannons and tear gas has clouded the country's city centres. The Ankara-based Human Rights Association says close to 1,000 people have been injured and more than 3,300 people have been detained over five days of protests.

The activist group denounced Erdogan's "vexing'' style and urged the government to halt Taksim Square redevelopment plans, ban the use of tear gas by police, the immediate release of all detained protesters and the lifting of restrictions on freedom of expression and assembly.

It also demanded that officials -- including governors and senior police officials -- responsible for the violent crackdown be removed from office.

The protests appear to have developed spontaneously and remain leaderless. It was not at all certain that the tens of thousands of protesters would heed any call by the group to cease.

The group of academics, architects and environmentalists, known as the "Taksim Solidarity Platform,'' was formed to protect Taksim Square from development, including the rebuilding of an Ottoman army barracks and a shopping mall. The protests were sparked by fury over a heavy-handed pre-dawn police raid Friday to roust activists camping out in an attempt to stop the plans.

Protests appeared to calm a bit on Wednesday, even as thousands of trade union members on a two-day strike marched to Taksim and to central Ankara.

Some demonstrations were largely jovial. In Ankara, protesters called themselves "looters.'' A sign on a stall in Taksim providing free food and water read "Revolution Market.''

But there were scattered violent clashes overnight on roads leading to Erdogan's offices in Ankara and Istanbul, as well as in the city of Antakya, near the Syrian border, where a protester was killed Wednesday from an apparent blow to the head.

Deputy Prime Minister Bulent Arinc, who is standing in for Erdogan while he is on a trip to Northern Africa, has offered an olive branch to protesters, apologizing for what he said was a ``wrong and unjust'' crackdown on the sit-in. Erdogan had inflamed protesters, calling them ``looters'' and extremists, and refusing to back away from plans to revamp Taksim.

"The steps the government takes from now on will define the course of society's reaction,'' Eyup Muhcu, the head of a chamber of architects, told reporters after meeting with Arinc.

Police meanwhile, detained 25 people for ``spreading untrue information'' on social media and allegedly inciting people to join the protests, the state-run agency reported. They were detained late Tuesday in the city of Izmir, western Turkey, the Anadolu Agency said. Police were looking for 13 others, it added.

The people were wanted for allegedly "inciting enmity and hatred,'' the agency said. A lawyer for the suspects denied that claim.

I have look at (their) files and examined the tweets, "the Radikal newspaper quoted lawyer Sevda Erdan Kilic as saying. ''There is nothing there to provoke the people (into rioting). They are sentiments that we all share.``

It was not immediately clear what the Twitter comments were.

Turkey's main broadcast media have been criticized for shunning the coverage of police brutality at the protest onset. Many people turned to social media to keep up to date.

Erdogan has referred to social media as "the worst menace to society.''

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  • Turkish protesters clash with Turkish riot policemen on Taksim square in Istanbul on June 22, 2013. Turkish police used water cannon today to disperse thousands of demonstrators who had gathered anew in Istanbul's Taksim Square, calling for the resignation of Prime Minister Recep Tayyip Erdogan. (BULENT KILIC/AFP/Getty Images)

  • Protesters hold up their hands as they gather on Taksim square before clashes with Turkish riot police in Istanbul on June 22, 2013 during a wave of new protests. (BULENT KILIC/AFP/Getty Images)

  • Protesters hold up their hands as they gather on Taksim square before clashing with Turkish riot police in Istanbul on June 22, 2013. (BULENT KILIC/AFP/Getty Images)

  • A man bleeds from a head wound as Turkish police clash with anti-government protestors while they clear Taksim Square and push them down the Istikhlal shopping avenue on June 22, 2013 in Istanbul, Turkey. (Photo by Scott Peterson/Getty Images)

  • A man braces against a shield as Turkish police clash with anti-government protestors while they clear Taksim Square and push them down the Istikhlal shopping avenue on June 22, 2013 in Istanbul, Turkey. (Photo by Scott Peterson/Getty Images)

  • An anti goverment protestor waves a Turkish flag with a portrait of Mustafa Kemal Ataturk, founder of modern Turkey on Taksim square during the clash between riot Police and protestors in Istanbul on June 22, 2013. (OZAN KOSE/AFP/Getty Images)

  • Protesters raise their hands as they gather on Taksim square during the clash between riot police and protestors in Istanbul on June 22, 2013. (OZAN KOSE/AFP/Getty Images)

  • Cyclists ride bikes during the silent protest at Taksim Square on June 23, 2013 in Istanbul, Turkey. Performance artist Erdem Gunduz, nicknamed 'The Standing Man,' became a new symbol of the anti-government protests after a eight-hour vigil in Taksim Square. (Photo by Burak Kara/Getty Images)

  • Turkish anti-government protestors gather in Taksim Square carrying carnations to mark the four people killed in weeks of protest on June 22, 2013 in Istanbul, Turkey. (Photo by Scott Peterson/Getty Images)

  • Turkish anti-government protestors push back on a police car, carnations sitting to mark the four people killed in weeks of protest, as police move into clear Taksim Square in Istanbul, on June 22, 2013 in Istanbul, Turkey. (Photo by Scott Peterson/Getty Images)

  • Turkish anti-government protestors gather in Taksim Square carrying carnations to mark the four people killed in weeks of protest on June 22, 2013 in Istanbul, Turkey. (Photo by Scott Peterson/Getty Images)

  • Turkish riot police argue with anti-government protestors as they begin moving in to clear Taksim Square, on June 22, 2013 in Istanbul, Turkey. (Photo by Scott Peterson/Getty Images)

  • People stand during a silent protest at Taksim Square on June 23, 2013 in Istanbul, Turkey. Performance artist Erdem Gunduz, nicknamed 'The Standing Man,' became a new symbol of the anti-government protests after a eight-hour vigil in Taksim Square. (Photo by Burak Kara/Getty Images)

  • People stand during a silent protest at Taksim Square on June 23, 2013 in Istanbul, Turkey. Performance artist Erdem Gunduz, nicknamed 'The Standing Man,' became a new symbol of the anti-government protests after a eight-hour vigil in Taksim Square. (Photo by Burak Kara/Getty Images)

  • A protester reacts in pain to a salvo of tear gas fired by Turkish riot police officers to chase out demonstrators and to dismantle the tent camp set up by demonstrators in Gezi Park in Istanbul on June 15, 2013. (MARCO LONGARI/AFP/Getty Images)

  • People light candles for the victims of the protests at Taksim square, in Istanbul, early Saturday, June 15, 2013. (AP Photo/Vadim Ghirda)

  • Protesters try to resist the advance of riot police in Gezi park in Istanbul, Turkey, Saturday, June 15, 2013. (AP Photo/Vadim Ghirda)

  • A protester reacts as police throw tear gas among tents during an operation to evacuate the Gezi Park of Taksim Square in Istanbul, Saturday, June 15, 2013. (AP Photo/Thanassis Stavrakis)

  • Police enter to evacuate the Gezi Park in Istanbul, Saturday, June 15, 2013. (AP Photo/Thanassis Stavrakis)

  • Protesters try to resist the advance of riot police in Gezi park in Istanbul, Turkey, Saturday, June 15, 2013. (AP Photo/Vadim Ghirda)

  • People march from Anatolian side to European side to Taksim square in Istanbul, on June 16, 2013. (BULENT KILIC/AFP/Getty Images)

  • Protesters take cover from a water cannon during clashes with riot police at a demonstration in Ankara on June 16, 2013. (ADEM ALTAN/AFP/Getty Images)

  • A pretzel vendor walks in front of a line of Turkish police cordoning off Taksim Square, in Istanbul, Turkey, Sunday, June 16, 2013. (AP Photo/Vadim Ghirda)

  • A protester reacts as Turkish riot police spray water cannon at demonstrators who remained defiant after authorities evicted activists from an Istanbul park, making clear they are taking a hardline against attempts to rekindle protests that have shaken the country, in city's main Kizilay Square in Ankara, Turkey, Sunday, June 16, 2013. (AP Photo/Burhan Ozbilici)

  • As police vehicles rolled into Kizilay Square, one woman approached a lightly armored truck bearing the logo of the police anti-terrorism department and grabbed a side window to ask those inside: "What is this oppression? Have you no fear of God? I have no children, but all of these (demonstrators) are my children!" she said, motioning to the young protesters nearby, in Ankara, Turkey, Sunday, June 16, 2013. (AP Photo/Burhan Ozbilici)

  • A protester reacts as Turkish riot police spray water cannon at demonstrators who remained defiant after authorities evicted activists from an Istanbul park, making clear they are taking a hardline against attempts to rekindle protests that have shaken the country, in city's main Kizilay Square in Ankara, Turkey, Sunday, June 16, 2013. (AP Photo/Burhan Ozbilici)

  • In this Saturday, June 15, 2013, file photo, protesters try to resist the advance of riot police in Gezi park in Istanbul, Turkey. (AP Photo/Vadim Ghirda, File)

  • Turkish protesters hold a massive rally on John F. Kennedy street near the U.S. Embassy, shouting slogans such as "government, resign!" in Ankara, Turkey, early Sunday, June 16, 2013. (AP Photo/Burhan Ozbilici)

  • In this Tuesday, June 11, 2013, file photo, a protester tries to remain standing as a police water cannon fires water during clashes in Taksim square in Istanbul. (AP Photo/Kostas Tsironis, File)

  • In this Tuesday, June 11, 2013, file photo, a protester tries protect from water projected by a water canon from police during clashes in Taksim square in Istanbul. (AP Photo/Kostas Tsironis)

  • People carry the coffin of Ethem Sarisuluk, one of five people killed during the recent protests in Turkey, as Turkish riot police spray water cannon at demonstrators who remained defiant after authorities evicted activists from an Istanbul park, making clear they are taking a hardline against attempts to rekindle protests that have shaken the country, in city's main Kizilay Square in Ankara, Turkey, Sunday, June 16, 2013. (AP Photo )

  • Police fire tear gas as riot police spray water cannon at demonstrators who remained defiant after authorities evicted activists from an Istanbul park, making clear they are taking a hardline against attempts to rekindle protests that have shaken the country, near city's main Taksim Square in Istanbul, Turkey, Sunday, June 16, 2013.(AP Photo )

  • Anti-government protesters demonstrate in central Ankara on June 17, 2013. (ADEM ALTAN/AFP/Getty Images)

  • Anti-government protesters demonstrate in central Ankara on June 17, 2013. (ADEM ALTAN/AFP/Getty Images)

  • People walk during a rally by the labor unions in Istanbul, Turkey, Monday, June 17, 2013. (AP Photo)

  • People shout anti-government slogans during a rally by the labor unions in Istanbul, Turkey, Monday, June 17, 2013. (AP Photo)

  • Erdem Gunduz, right, stands silently on Taksim Square in Istanbul, Turkey, early Tuesday, June 18, 2013. (AP Photo)

  • A protester stands in a silent protest at Taksim Square in, Istanbul, Turkey, Tuesday, June 18, 2013. After weeks of sometimes-violent confrontation with police, Turkish protesters have found a new form of resistance: standing still and silent. (AP Photo/Petr David Josek)

  • Mert Solkiran, centre, stands in a silent protest at Taksim Square in, Istanbul, Turkey, Tuesday, June 18, 2013. After weeks of sometimes-violent confrontation with police, Turkish protesters have found a new form of resistance: standing still and silent. (AP Photo/Petr David Josek)

  • Erdem Gunduz, left, and dozens of people stand silently on Taksim Square in Istanbul, Turkey, early Tuesday, June 18, 2013. After weeks of confrontation with police, sometimes violent, Turkish protesters are using a new form of resistance: standing silently. The development started late Monday when a solitary man began standing in passive defiance against Prime Minister Recep Tayyip Erdogan's authority at Istanbul's central Taksim Square. The square has been sealed off from mass protests since police cleared it over the weekend. The man has identified himself as Erdem Gunduz, a performance artist. His act has sparked imitation by others in Istanbul and other cities. It has provoked widespread comment on social media. (AP Photo)

  • Protestors stand in a silent protest at Taksim Square in, Istanbul, Turkey, Tuesday, June 18, 2013. After weeks of sometimes-violent confrontation with police, Turkish protesters have found a new form of resistance: standing still and silent. (AP Photo/Petr David Josek)

  • A man sleeps at Taksim's Gezi Park early on June 12, 2013 in Istanbul, hours after riot police invated the square. (ANGELOS TZORTZINIS/AFP/Getty Images)

  • Demonstrators wait at the entrance of Taksim Gezi park on June 12, 2013. (GURCAN OZTURK/AFP/Getty Images)

  • Turkish lawyers march in support of anti-government protests in Ankara, on June 12, 2013. (AFP/Getty Images)

  • Demonstrators wait at the entrance of the Taksim Gezi park on June 12, 2013 after a night of running battles with riot police as Turkish Prime Minister moved to crush mass demos against his Islamic-rooted government. (GURCAN OZTURK/AFP/Getty Images)

  • Lawyers and members of the Turkish bar association shout slogans as they march in support of anti-government protests in Ankara, on June 12, 2013. (STRINGER/AFP/Getty Images)

  • Turkish lawyers march in support of anti-government protests in Ankara, on June 12, 2013. (AFP/Getty Images)

  • Riot police fire tear gas to disperse the crowd during a demonstration near Taksim Square on June 11, 2013 in Istanbul, Turkey. (Photo by Lam Yik Fei/Getty Images)

  • Protesters clash with riot police at Taksim square in Istanbul on June 11, 2013. (ARIS MESSINIS/AFP/Getty Images)

  • Riot police fire tear gas to disperse the crowd during a demonstration near Taksim Square on June 11, 2013 in Istanbul, Turkey. (Photo by Lam Yik Fei/Getty Images)

  • An injured person is helped by fellow protesters during clashes with police on Taksim square in Istanbul, on June 11, 2013. (BULENT KILIC/AFP/Getty Images)