At least three people watched a livestream as gunmen filmed themselves killing three people in Monday's attack at the Islamic Center of San Diego before their own deaths, according to a CBS News analysis of footage from the attack. One viewer urged another to alert law enforcement, but it is not clear if anyone did. A recording of the attack later circulated online, including on so-called "gore websites" that have previously served as gathering places for admirers of mass shooters. According to

Tag-uri: Islam