State media reported police arrested eleven people, including four they claim were gunmen, for the attack on a Moscow-area performance hall that has left 133 people dead, according to CBS News. The report stated the suspects were arrested in the Bryansk region of western Russia, which borders Ukraine, likely to add fuel to Kremlin talking points that the attackers were affiliated with the Ukrainian military. ISIS has claimed responsibility for the attacks, with US officials saying they warned the Kremlin of signs of an impending terrorist act, but Putin brushed off the information.