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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Joerger, who is from Staples, Minnesota, and went to college at Division-II Minnesota State, Moorhead, went 50-32 in his first season as Grizzlies coach last year. After a rough start while the team transitioned from coaching veteran Lionel Hollins to the first-timer Joerger, the Grizzlies pulled together, overcame several injuries to key players and surged to the seventh seed in the hyper-competitive Western Conference. But after losing in the first round of the playoffs to the Oklahoma City Thunder, owner Robert Pera made the surprising decision to overhaul the front office. He fired CEO Jason Levien and director of player personnel Stu Lash, two moves that immediately called into question Joergers job security. Joerger goes way back with Timberwolves president of basketball operations Flip Saunders. As a young coach trying to make his way up the ladder, Joerger came to watch Saunders, who coached the Timberwolves from 1995-2005, run practices. The two formed a mutual respect which lasts to this day. Saunders, who coached in the CBA before breaking into the NBA, has long had an affinity for coaches who had to grind it out in the minor leagues, believing they learn not only how to coach, but to run an organization. Joerger won championships in the NBDL, the Internattional Basketball Association and the CBA before joining the Grizzlies as an assistant to Lionel Hollins.dddddddddddd Joergers experience as a head coach last year with the Grizzlies helps him fit the profile Saunders is looking for in a replacement for Rick Adelman, who retired last month. Saunders has said he wants a proven coach who knows the demands of running an NBA team, including handling questions from the media. The latter qualification is of particular concern for the Wolves right now with star forward Kevin Love set to opt out of his contract after next season. The Wolves are considering all their options with Love, including potentially trading him this summer. If the Wolves do not trade Love, they will head into the season with one of the major storylines in the league, one sure to draw attention from media all across the country. Thats part of the reason Saunders is reluctant to turn over the keys to a first-time head coach. The Wolves interest in Joerger was first reported by the Star Tribune of Minneapolis. The Timberwolves opening has also been linked to Hollins and college coaching stars such as Michigan States Tom Izzo, Floridas Billy Donovan and Iowa States Fred Hoiberg. Saunders has yet to offer the job to anyone, but it is believed that the uncertainty surrounding Love has caused some of the more high profile names on Saunders list to give tepid responses to inquiries. The situation with Love in Minnesota pales in comparison to the upheaval in Memphis, and the opportunity to bring his family back to his home state could be enough to convince Joerger to make the move if an offer comes his way. The two sides were working Wednesday to set up a meeting, which could come as soon as Thursday. ' ' '