A gunman killed 49 people at a packed gay nightclub in Orlando, Florida on Sunday in the worst mass shooting in US history, an attack that was later claimed by the Islamic State (IS) group.

Orlando nightclub shooting: Obama tells gay community 'you are not alone'

A gunman killed 49 people at a packed gay nightclub in Orlando, Florida on Sunday in the worst mass shooting in US history, an attack that was later claimed by the Islamic State (IS) group.