The London Bridge terrorists who slaughtered seven people were shot dead by police hail of 50 bullets by eight officers.

Police also confirmed a member of the public was caught in the crossfire, but survived.

The attack has left 21 people in a critical condition after the three terrorists drove a van into pedestrians on London Bridge before stabbing bystanders.

Assistant Commissioner Mark Rowley said armed officers fired an unprecedented number of rounds to make sure they had neutralised the attackers, who initially appeared to be suicide bombers.

Speaking at a press conference this afternoon, Mr Rowley said: “Eight police firearms officers discharged their weapons.

“Our initial assesment is in the region of 50 rounds, in the region of 50 bullets were fired by those eight officers. The three attackers were shot dead.”

He said police are making “significant progress” in identifying the three attackers.

Four police officers are among the total of 48 following last night’s attack night.

Three men launched the frenzied and murderous rampage around Borough Market in central London as revellers were out enjoying their evening.

NHS England confirmed this afternoon that 21 of the people injured in the terror attack are in a critical condition.