New York: Islamic State (IS) terrorist group has claimed the responsibility for the shootings in which at least 50 people were killed and 53 others injured when a "lone wolf" gunman opened fire early on Sunday in a gay nightclub in Orlando, Florida, where a state of emergency has been declared.

Lights from police vehicles light up the scene infront of the Pulse club in Orlando, Florida on June 12, 2016. AFP/ Photo