(MOSCOW-AFP) - Moscow's two main international airports Wednesday announced a flat ban on all carry-on liquids as part of a mass security clampdown ahead of next month's Sochi Winter Games.

Sheremetyevo and Vnukovo airports handle the vast majority of Russia's international air traffic and will receive the bulk of foreign fans arriving for the February 7-23 sports festivities on the shores of the Black Sea.

Their joint move caught many Russians off guard and sparked a furious online debate about a measure that appears to extend to medication and cosmetics.

Russia this week launched the largest security operation in Olympic history that is meant to ward off the threat of Islamist violence following twin suicide attacks in the southern hub of Volgograd last month.

The December 29-30 bombings left 34 dead and sparked fears of a renewed terror campaign by militants from the nearby North Caucasus who have threatened attacks before and during the Games.

Sheremetyevo airport said on its website that the ban covers "all liquids, including personal hygiene items, cosmetics, medicine, liquids, sprays and gels in any amount."

The restrictions -- adopted by the Federal Air Transport Agency (Rosaviatsiya) -- apply until March 21. The two airports had previously let passengers take up to 100 millilitres (3.4 ounces) of liquids on board their flights.

Security has been a prime concerns ever since President Vladimir Putin beat extreme odds in 2007 to bring Russia's first post-Soviet Games to the Black Sea summer resort.

Russia on Tuesday saw soldiers in armoured vehicles and navy officers on the Black Sea join a 37,000-strong contingent overseeing security in and around Sochi.

A Kremlin decree also establishes a so-called "forbidden zone" around Sochi that blocks highways into the city and prevents all residents from using roads leading to Olympic venues without special permits.

Security analysts argue the mass attention devoted to safety around Olympic venues may have left Russia exposed to attacks at other locations.

But the stringent new airport restrictions sparked complaints from some Russians.

Russia's Aeroflot flagship airline notably said travellers will be stripped of prescribed medication unless they can prove it needs to be used during flights.

"This is really inconvenient," a man who identified himself as Yevgeny Koval complained on Aeroflot's Twitter account.

Related on HuffPost:

Loading Slideshow...
  • Olympic rings for the 2014 Winter Olympics are installed in the Black Sea resort of Sochi, southern Russia, late Tuesday, Sept. 25, 2012. With the Winter Olympics a year away, IOC President Jacques Rogge praised Sochi organizers on Wednesday, Feb. 6 and defended the $51 billion price tag.

  • In this Friday, April 5 photo ski resort employees scale down a pile of snow which is being covered by insulated fabric. The Rosa Khutor Alpine skiing resort which is hosting the 2014 Winter Olympics is set to store nearly half a million cu. meters of snow collected in piles and tightly covered with insulated blankets.

  • Activists of ultranationalist organizations rally in Moscow, on May 1, to call for President Vladimir Putin's resignation and a boycott of the 2014 Winter Olympic Games in Sochi.

  • In this Friday, April 5 photo a ski resort employee stands on top of a snow storage next to rolls of insulated blankets. The Rosa Khutor Alpine skiing resort which is hosting the 2014 Winter Olympics is set to store nearly half a million cu. meters of snow collected in piles tightly covered by insulated blankets.

  • In this photo dated Monday, Feb. 4, an aerial view of the Olympic Park as construction works continue in the lead up to the upcoming winter games in Sochi, Russia. With just one year till the opening ceremony of the winter Olympic 2014 Sochi Games, the Black Sea resort of Sochi is a vast construction site sprawling for nearly 40 kilometers (25 miles) along the coast and 50 kilometers (30 miles) up into the mountains, with no escape from the clang and clatter of the construction works, the drilling, jack-hammering and mixing of cement.

  • In this photo dated Feb. 2, the Iceberg skating arena at the Russian Black Sea resort of Sochi,

  • In this photo dated Monday, Feb. 4, an aerial view of the Olympic Park as construction works continue in the lead up to the upcoming winter games in Sochi, Russia.

  • Activists from Reporters Without Borders stands in front a banner with blood-covered brass knuckles in the form of the Olympic rings which are displayed on the fences of the Russian embassy in Paris, Friday, March 1. Reporters Without Borders activists protest against the 2014 Sochi Winter Olympics games in Russia and the working conditions against journalists working in Russia.

  • A Half-pipe is seen during of the FIS World Cup snowboarding half-pipe event, in Rosa Khutor ski resort, some 60 km east of Sochi, Russia, Thursday, Feb. 14. The Roas Khutor resort forms part of the venue which will host the Sochi 2014 Winter Olympics.

  • Russian President Vladimir Putin and IOC President Jaques Rogge, bottom left and second left, press a symbolic button to mark one year to the start of 2014 Winter Olympics, in Sochi, Russia, Thursday, Feb. 7.

  • Russian President Vladimir Putin, left, and IOC President Jaques Rogge shake hands after pressing a symbolic button to mark a 1 year to the start of 2014 Winter Olympics, in Sochi, Russia, Thursday, Feb. 7.

  • Fireworks are seen over the Bolshoi Ice Dome stadium during a ceremony to mark a one year to the start of 2014 Winter Olympics, in Sochi, Russia, Thursday, Feb. 7.

  • The shadow of a performer is cast on a board as spectators watch a ceremony to mark the one year to the start of 2014 Winter Olympics, in Sochi, Russia, Thursday, Feb. 7. Russia on Thursday marked the one-year countdown to the Sochi Games, which are considered a matter of national pride and a priority for President Putin. The countdown celebrations culminated later Thursday in a star-studded ice show at one of the Olympic arenas, attended by Putin and IOC President Jacques Rogge.

  • A countdown clock for the 2014 Sochi Olympics is installed outside the Kremlin in Manezh Square, with Kremlin's Spassky Tower at right in the background, in Moscow, Russia, Thursday, Feb. 7, 2013. (AP Photo/Mikhail Metzel)