US worst massacre, 50 dead in a gay club

The self-proclaimed Islamic State has claimed responsibility for the deadliest mass shooting in United States history, which has left at least 50 dead and dozens more injured. Authorities say 29-year-old Omar Mateen opened fire in a gay nightclub in the Florida city of Orlando before being shot dead by police. As Ivan and Selina report, U-S president Barack Obama has described the killings as an act of terror and hate.

Undated image of Omar Mateen (AAP) Source: AAP