A man with a British accent seen in ISIS videos showing the beheadings of Western hostages was identified Thursday as Mohammed Emwazi, a Kuwaiti-born Londoner, according to two U.S. officials and two U.S. congressional sources briefed on the matter. The Washington Post earlier reported that Emwazi is "Jihadi John," citing one of Emwazi's close friends. A Muslim-led human rights advocacy group in London, CAGE, which had contact with Emwazi over alleged "harassment" by UK security services, also said in a statement there were "some striking similarities" between 26-year-old Emwazi and the man seen in execution videos holding a knife. London's Metropolitan Police declined to confirm the reported identity. CNN has been unable to confirm the reporting. "We have previously asked media outlets not to speculate about the details of our investigation on the basis that life is at risk," said Commander Richard Walton of the Metropolitan Police's Counter Terrorism Command. "We are not going to confirm the identity of anyone at this stage or give an update on the progress of this live counter-terrorism investigation." A UK Foreign Office spokeswoman told CNN: "We will neither confirm nor deny the current reporting as to the identity of Jihadi John
