Black Widow Suicide Bomber: Police in Sochi launched an urgent search for a possible female "Black Widow" suicide bomber who may have already made it past security set up for the Olympic Games. The U.S. State Department updated its travel alert for Americans heading to the Winter Olympics in Sochi.

The Travel Alert now says "TERRORISM: Large-scale public events such as the Olympics present an attractive target for terrorists, and the U.S. government continues to monitor reported threats of potential terrorist attacks in Sochi or in Russia in general. Acts of terrorism, including bombings and hostage takings, continue to occur in Russia, particularly in the North Caucasus region. Between October 15 and December 30, 2013, there were three suicide bombings targeting public transportation in the city of Volgograd (600 miles from Sochi), two of which occurred within the same 24-hour period.In early January 2014, media reports emerged about the possible presence of so-called "black widow" suicide bombers in Sochi.

"These reports have not been corroborated, and the U.S. government continues to seek further information. Other bombings over the past 10-15 years occurred at Russian government buildings, airports, hotels, tourist sites, markets, entertainment venues, schools, and residential complexes. There have also been large-scale attacks on public transportation including subways, buses, trains, and scheduled commercial flights, in the same time period."

As many as three "Black Widow" suicide bombers may have gotten through security in Sochi. Authorities who are responsible for security at the Winter Olympics say they are hunting for three potential suicide bombers dubbed by the press as "Black Widow" suicide bombers.

Russian police are looking Black Widow female suicide bombers in the Black Sea resort city of Sochi. Next month Sochi will host the Winter Olympics. Russian security officials are plastering the city with leaflets. The police fear the Black Widow bomber may have already made it past the security that has been set up for the Olympic Games.

There is an urgent search in Russia for a "Black Widow" suicide bomber who may target the upcoming Olympics. Authorities worried the Black Widow suicide bomber may already be in Sochi. They are also afraid there may be 3 or four Black Widow suicide bombers already in position.

In late December, Volgograd, Russia, was attacked twice by female suicide bombers. The explosions killed 34 and injured over a hundred peoples. On Sunday, a video was posted by an Islamic militant group in Dagestan claiming that they were responsible for the bombings. The group threatened to strike the Winger Olympic games in Sochi.

ABC News reported that Hotel employees in Sochi were shown pictures and descriptions of a 22-year-old woman from nearby Dagestan who they believe might be one of the Black Widow suicide bombers. Posters and flyer have also been posted at Sochi's airport. Russian security services may be looking for as many as four "black widows." The suicide bombers may have been dispatched to carry out terrorist attacks related to the Winter Olympics. U.S. and Russian sources told

NBC News that one black widow suicide bomber is believed to be in or near the Olympic city of Sochi.

The Winter Olympics will be held Feb. 7-23. Russia has mounted an intense security operation in Sochi but is worried about "soft targets" like buses and tourist facilities which are outside the game.

On Monday, the U.S. military pledged to make air and naval support available for Olympic security. In a statements, a spokesman for the Pentagon spokesman said that supported includes two U.S. Navy ships in the Black Sea that will be made available "for all manner of contingencies" if the Russian government requests them.

The woman is identified as Ruzanna Ibragimova is  the widow of a militant who was killed in shootout in the Dagestan region of Russia. Russian authorities have  identified Ibragimova as a possible suicide bomber. They believe she might already be in Sochi for the Olympic Games. The Black Widow suicide bomber also goes by the name Ruzan, or Ruzana, Ibragimova and isalso known as Salima.

Police believe Ruzanna Ibragimova is affiliated with the Caucasus Emirate, the terror group led by Doku Umarov. The group has threatened attacks against the Winter Games in Sochi.

Police describe Ibragimova as having a 10 centimeter scar across her left cheek. They say the Black Widow has a noticeable limp. She can also be ID'd by a stiff left arm that doesn't bend at the elbow.

The wanted poster says Ibragimova left Dagestan earlier this month and arrived in Sochi about ten days ago.

Georgetown University professor Christopher Swift, who has studied militant groups in the North  Caucasus says "The fact that one individual either was able to stay in the area before the ring of steel went up or get through it really raises questions about the strength of the Russia security apparatus. The specific worry is that she's a woman and because of that it's easier for women to infiltrate indoor or outdoor venues, that she could be a bomb carrier."

He said it is rare for the group's suicide bombers to operate alone, "Usually, in the past, when we've seen female suicide bombings, there's either been two women who are both bombers."