NEW DELHI - Authorities have shut down roads in the heart of India's capital to put an end to weeklong demonstrations against the brutal gang rape of a woman in a moving bus.

Thousands of armed police and paramilitary troops blocked roads in central New Delhi on Monday to prevent protesters from marching to the presidential palace.

Prime Minister Manmohan Singh appealed for calm and promised that the government would take action to prevent crimes against women.

Singh said, "Anger at this crime is justified, but violence will serve no purpose."

There has been outrage across India over the Dec. 16 gang rape that left the young woman in critical condition in a hospital.

Police used tear gas and water cannons and hit protesters with batons during weekend protests.

Also on HuffPost:

Loading Slideshow...
  • 10. Ireland

    <em>Caption: Shoppers pass a pub called The Bankers on December 1, 2010 in Dublin, Ireland. (Photo by Peter Macdiarmid/Getty Images)</em>

  • 9. Switzerland

    Caption: A general view of Davos on January 10, 2012 in Davos, Switzerland. (Photo by Harold Cunningham/Getty Images)

  • 8. Netherlands

    <em>Caption: Bikes are chained to a bridge across a canal on May 11, 2009 in Amsterdam, Netherlands. (Photo by Mark Dadswell/Getty Images)</em>

  • 7. Finland

    <em>Caption: Finnish men enter naked a cold lake as they spend the day at a public sauna in Helsinki on April 15, 2011. (JONATHAN NACKSTRAND/AFP/Getty Images)</em>

  • 6. Canada

    <em>Caption: The sun sets over the Toronto skyline in his undated file photo. (Photo by Carlo Allegri/Getty Images)</em>

  • 5. New Zealand

    <em>Caption: A sheep stands on the hill near Dunedin, on September 20, 2011. (AFP PHOTO / CHRISTOPHE SIMON)</em>

  • 4. Australia

    Beach chairs are seen overlooking a coral lagoon on January 14, 2012 in Lady Elliot Island, Australia. (Photo by Mark Kolbe/Getty Images)

  • 3. Sweden

    <em>Caption: Swedish flags on Stockholm's skyline fly at half mast 01 January 2005. (SVEN NACKSTRAND/AFP/Getty Images)</em>

  • 2. Denmark

    <em>Caption: A general view of a frozen lake in the Orsteds Parken in central Copenhagen, on January 22, 2006 in Copenhagen, Denmark. (Photo by Chris Jackson/Getty Images)</em>

  • 1. Norway

    <em>Caption: People enjoy the Summer weather walking along a busy shopping district as a street performer poses as a statue July 28, 2011 in Oslo, Norway. (Photo by Paula Bronstein /Getty Images)</em>