A gunman who pledged his allegiance to Islamic State before he massacred 49 people at a gay nightclub in the US had “strong indications of radicalisation”, the FBI said.

Doctors fear the death toll from the deadliest mass shooting in US history will rise, as the identities of the 50 people who were gunned down began to emerge.

Police have arrested three men over the fatal shooting of a man in Liverpool.

Police are patrolling the streets of Liverpool after a man was killed in the fifth shooting in less than three weeks.