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. 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Tokarski, a somewhat controversial choice -- with his 10 games of NHL experience and all -- to replace an injured Carey Price in Game Two had a night to remember, turning back a Rangers team that was dominating play from the get-go, outshooting the Canadiens 14-4 in the first period and 37-25 overall. Zack Martin Jersey . The closer wasnt available. The road trip, a disaster to that point.CHARLOTTE, N.C. - Cam Newton said his focus is on getting back on the football field, not a new contract. The Panthers quarterback said Wednesday hes happy for San Franciscos Colin Kaepernick, who recently signed a six-year, $126 million contract. He even sent a congratulatory text message to Kaepernick, who beat Newton and the Panthers in the NFC divisional playoffs 23-10 in January. The Panthers have talked about a long-term contract for Newton but no deal has been completed. "For me, thats the last thing thats on my mind," Newton said. Newton didnt practice Wednesday as he continues to rehab his left ankle following surgery in March, but spoke to the media inside the stadium afterward. He said he wants to participate in next weeks three-day minicamp, but isnt sure if hell be ready. Newton and Kaepernick are linked in many respects because they came out of college the same year. Newton was selected first overall in the NFL draft in 2011, but only this past year did he finally get the Panthers to the playoffs. Kaepernick was selected 35 picks behind Newton but has helped the 49ers reach the NFC championship game three straight seasons. "Two different people, two different organizations," Newton said. "I wish Colin the best. ... I reached out and told him he deserved it. To do what he has done up to this point, he deserves to get paid." Newton can make an argument he does too based on three impressive statistical seasons. He has started every game for the Panthers since coming into the league and thrown for 11,299 yards with 64 touchdown passes and 42 interceptions. Hes also run for 2,032 yards and 28 TDs. But while general manager Dave Gettleman said Newton has proven to him that hes a franchise quarterback, the salary cap strapped Panthers havent signed the former Heisman Trophy winner to a long-term deal. The Panthers did pick up the option on the fifth year of Newtons rookie contract, which means Newtons sallary will jump from $3.dddddddddddd million this year to $14.6 million in 2015. Newton has been working on an underwater treadmill in recent weeks, receiving ice and stem treatments for his left ankle. Hes also been throwing passes on the side during six of the teams last nine OTA practices. He said hes still experiences some pain in his ankle that reminds him hes not quite 100 per cent. The teams three-day minicamp begins Tuesday. "Physically Im coming along fine and Im on page right where I expected to be, but mentally Im bored," Newton said. Newton said hes spent the last seven weeks pouring over game film from last year and practice film from OTAs. He acknowledged that while the extra time in the film room has been beneficial, he said it has become "a little monotonous." When he returns to the field Newton will be looking to develop some chemistry with an overhauled corps or wide receivers. The Panthers cut ties with their top four wide receivers from last year, including Newtons go-to guy Steve Smith. The team added free agents Jerricho Cotchery, Jason Avant and Tiquan Underwood and drafted Kelvin Benjamin in the first round. While Newton wasnt ready to say this years group of receivers is better than last years, he did say they have a chip on their shoulders. "The elephant in the room has already been stated," Newton said. "Those guys have already accepted the challenge. You dont have to go in there and tell those guys, Hey, youre projected (to be) the sorriest receiver (group) in the NFL. We already know. "But with that, those guys already have that fire in their eyes. I would rather those guys be like that and for them to go out there and bust their tails like theyve been doing. 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