Fifty people are dead after a gunman opened fire at an Orlando gay club, the city's mayor said.
In the worst mass shooting in US history a man thought to have been armed with an assault-type rifle and a handgun opened fire at the Pulse night club, Buddy Dyer told reporters.
The killer, who also took hostages, was later killed in a gunfight with Swat officers in the Florida city.
More than 53 have also been taken to hospital following the incident which happened around 2am (7am BST) local time.