The man who has been recorded in videos threatening and killing several Western hostages in the name of the self-proclaimed Islamic State is Mohammed Emwazi. He is from London and is a British citizen of Kuwaiti descent.
British security services have been aware of the identity of the militant many have dubbed "Jihadi John," the BBC says, adding that "they chose not to disclose his name earlier for operational reasons."
Emwazi's name was reported by The Washington Post early Thursday, citing interviews with his friends and associates. The newspaper says he is "from a well-to-do family ... and graduated from college with a degree in computer programming."
We'll update this post as more details come in.
Update at 8:35 a.m. ET: Confirmation Of Details
Intelligence sources tell NPR that they can confirm the ISIS figure's name is Mohammed Emwazi and that he is from London, is college-educated and has been in Syria since 2012.
Update at 7:35 a.m. ET: No Comment From Prime MinisterRead more...