SOCHI, Russia -- Russian security officials are hunting down three potential female suicide bombers, one of whom is believed to be in Sochi, where the Winter Olympics will begin next month. Police leaflets seen by an Associated Press reporter at a central Sochi hotel on Tuesday contain warnings about three potential suicide bombers. A police letter said that one of them, Ruzanna Ibragimova, a 22-year-old widow of an Islamic militant, was at large in Sochi. A U.S. congressman who was in Sochi on Tuesday to assess the situation said he was impressed by the work of Russian security forces but troubled that potential suicide bombers had gotten into the city, despite all of the extraordinary security measures. "We know some of them got through the perimeter," Rep. Michael McCaul, chairman of the U.S. House Homeland Security Committee, told The Associated Press. "Shes for real. What we dont know is how many more black widows are out there." Russian authorities have blamed the so-called "black widows" of slain insurgents for previous suicide attacks in the country. The Black Sea resort town will host the games amid concerns about security and potential terrorist attacks. The southern city of Volgograd was rocked by two suicide bombings in late December, which killed 34 and injured scores more. An Islamic militant group in Dagestan posted a video on Sunday claiming responsibility for the bombings and threatened to strike the games in Sochi, about 500 kilometres (300 miles) west of Dagestan. McCaul, a Republican from Texas, said he had numerous meetings with officials in Moscow and Sochi, and was briefed by the joint operation centre in Sochi, which is responsible for overall security in the area. "The one improvement I would ask of the Russians is to allow our intelligence services to co-ordinate and co-operate better with theirs," McCaul said. Although the Russian side was confident that it could provide security, the U.S. has information that could help keep the games safe, he said. The congressman also expressed concern that terrorists could have gotten into Sochi before security was tightened. "How many potential cells could be in Sochi and the Olympic village?" he said. "But after the ring of steel was implemented we have this one person who seems to have been able to penetrate it. It does demonstrate vulnerability." Police material distributed to the hotel staff included pictures of two other women in veils: 26-year-old Zaira Aliyeva and 34-year-old Dzhannet Tsakhayeva. It said they had been trained "to perpetrate acts of terrorism." It warned that the two women "are probably among us," but, unlike Ibragimovas case, did not say if they are in Sochi. No further information was provided about the two women or their motivation. The term "black widow" refers to the belief that women who have carried out past suicide attacks in Russia did so to avenge the deaths of husbands or other male relatives. Security officials in Sochi were not available for comment on Tuesday. The Olympics are to be held Feb. 7-23. Russia has mounted an intense security operation in the city, but concern persists that "soft targets" outside the Olympic venues, such as buses and tourist facilities, are vulnerable to attack. Russian troops also have been active fighting militants in Dagestan, one of the predominantly Muslim republics in Russias North Caucasus and the centre of an Islamic insurgency that has engulfed the region. On Tuesday, troops shot dead the leader of a militant group, Interior Ministry spokeswoman Fatina Ubaidatova said. She said the militant, Eldar Magatov, was wanted in attacks on security forces, bombings and the extortion of businessmen. Interior Ministry troops elsewhere in Dagestan defused an explosive device placed near a village administration building and engaged in a firefight with militants holed up in a house, the spokeswoman said. Marcus Rashford Jersey . - A Tuesday funeral is planned in Toronto for 20-year-old Saginaw Spirit forward Terry Trafford. Eric Dier Jersey . -- Kurt Buschs Sunday at Martinsville Speedway, in some ways, was like his career wrapped into one afternoon. http://www.englandsoccerpro.com/Fabian-Delph-England-Jersey/ . -- Jonathan Diaz is easy to spot in the Blue Jays clubhouse. Dele Alli England Jersey . Bradwell was scheduled to become a free agent Tuesday. Born and raised in Toronto, Bradwell is entering his sixth CFL season, with all six played for his hometown Argonauts. John Stones Jersey .Y. - Everyone expected Clayton Kershaw to pitch a shutout, and he did — a unanimous choice for the NL Cy Young Award.NEW ORLEANS - The New Orleans Saints and right tackle Zach Strief have agreed to a five-year contract extension. Strief, who has spent his entire eight-year career in New Orleans and became a starter in 2011, had entered free agency last week but had expressed an interest in working out a deal to remain with the Saints if the club could field a competitive offer. Financial terms of the deal, announced Monday by general manager Mickey Loomis, have not been disclosed. Last season, Strief started 15 regular season games and both playoff games, giving him 45 regular season starts and four playoff starts in his career. He also was a regular reserve on playoff teams in 2009 and 2010. "We are excited to announce that Zach will stay with us into the future," Loomis said. "Not only has he done an excellent job at the right tackle pposition, but he has served us well as an offensive team captain for the past two seasons and has always been a great asset in the community since he first came here in 2006.dddddddddddd" Strief, who played in college at Northwestern, was one of two seventh-round picks by the Saints in the 2006 NFL draft, the other being receiver Marques Colston. Strief has appeared in 109 career regular season games and has been one of the veteran leaders of one of the top ranking offences in the NFL the past three seasons, duing which the club has ranked first, second and fourth in net yards per game. He has also taken part in numerous community service endeavours, highlighted by his work with a restaurant which trains at-risk New Orleans youth the skills needed to work at various positions in the citys renowned restaurant industry. ' ' '