RT News - June 13, 2016 (12:00 MSK)

An Islamic State sympathiser is named as the killer in America's deadliest mass shooting. Omar Mateen shot dead 50 people in a gay nightclub in Orlando. The FBI admits interviewing Mateen twice over suspected links to an American suicide bomber in Syria. But says their investigation proved inconclusive. Tributes pour in from across the world for the victims of the worst terror attack in America since 9-11.