BREAKING: Shooter at Florida nightclub may have taken hostages
A shooting has been reported at a nightclub in the Florida city of Orlando, with preliminary reports indicating that the attacker may have taken hostages.
The incident happened at the Pulse Club, a gay nightclub in the city. It posted on its Facebook page: "Everyone get out of pulse and keep running".
Video footage being shared on social media showed wounded people being treated at the scene.
No official details of the incident have yet been given.
Local TV reporter Stewart Moore tweeted that he had been told by a source that more than 20 people had been shot.
He said the attacker was still inside the nightclub with hostages, and was feared to be wearing a bomb.
Photos on social media show dozens of emergency vehicles at the scene.