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. Nike Air Zoom Ofertas . 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. Zapatillas Nike Zoom Baratas .twitter.com/xBTpoAKLJk — Daryl Zerr (@darylzerr) May 29, 2014 @BarDown I give to you the @SquirrelsNCHL aka the Fighting Squirels. Nike Zoom España . -- Arizona pitcher Bronson Arroyo is expected to miss a week to 10 days because of a back injury. http://www.nikezoombaratas.es/ . They never thought it would take some blood, too. Kevin Love grabbed his 4,000th career rebound as part of a 19-point, 13-board effort to lead the Timberwolves over the Utah Jazz 112-97 on Tuesday night.NICOSIA, Cyprus -- Lianne Sanderson scored twice and England defeated Canada 2-0 Monday at the Cyprus Cup womens soccer tournament. Sanderson put England on the board quickly with a goal in the first minute, and then scored again in the 33rd to give her team a comfortable lead heading into the half. Canada tried to come back in the second half but England defended well and held on for the win. Siobhan Chamberlain earned the clean sheet for England. "We know at this level, the first goal is probably the most important feature. It gives you the upper hand in the tactics," Cannada coach John Herdman said. Comprar Nike Zoom Baratas. "So England, from that point could drop a lower block and hit us on the counter, which is what they did." England clinched first place in Group A with the win and moved on to the final. Canada fell to 2-1 and will play in the third-place match. "I think today we were very resilient," Canadian goalkeeper Erin McLeod said. "We came out in the second half 2-0 down and we kept fighting and I thought we played really well in the second half. I believe this team will do the same thing in our next game." ' ' '