Threats were received from the group Vilayat Dagestan, which had claimed responsibility for the Volgograd bombings under the demands of Umarov, and a number of National Olympic Committees had also received threats via e-mail, threatening that terrorists would kidnap or "blow up" athletes during the Games. However, while the IOC did state that the letters "[contained] no threat and appears to be a random message from a member of the public", the U.S. ski and snowboarding teams hired a private security agency to provide additional protection during the Games.