The FBI appears to be fighting back against Lulz Sec, the hackers who recently attacked several corporate and government websites. On Tuesday, British police announced they had arrested a 19-year-old man for allegedly participating in cyberattacks "by a single hacking group." The FBI assisted in the investigation, and the Daily Mail says he could face extradition to the U.S. The FBI also confiscated several servers from a data center in Virginia, affecting popular services like InstaPaper and the Curbed blog network. It is unclear whether the raid was related to the Lulz Sec investigation, though a government official told the Times Tuesday that the FBI is actively investigating the group. Separately, the lead researcher at Imperva says he has identified the members of Lulz Sec.