Police in Florida say 50 people were killed and a further 53 were injured after a gunman opened fire at a nightclub in Orlando.
The suspect - who was also killed - has been named as Omar Mateen - a US citizen of Afghan descent from Port St Lucie.
State of emergency declared in Orlando.
The city's mayor Buddy Dyer, says help has already been offered by neighbouring states:
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"Because of the scale of the crime, I've asked the Governor to declare a state of emergency.
"We're also issuing a state of emergency to Orlando so we can bring additional resources to bare with the aftermath."
