The victims of America's worst mass shooting are being mourned in Florida, as Islamic State claims it was involved.

50 people were killed - and 53 injured - at a gay nightclub in Orlando.

The Amaq news agency - which is linked to IS - said the atrocity had been "carried out by an Islamic State fighter".

The suspect, 29-year-old Omar Mateen, was shot dead by police.

Florida's governor, Rick Scott, says terrorism was clearly involved.