Metropolitan Police Chief Cressida Dick said officers were called just before 2 p.m. to Fishmongers’ Hall, a conference venue at the north end of London Bridge. Another depicted a man in suit and overcoat holding a long knife that apparently had been taken from the attacker. Cars and buses on the busy bridge stood abandoned after the shooting, with a white truck stopped diagonally across the lanes. London Bridge station, one of the city’s busiest rail hubs, was closed for several hours after the attack. Some had been through similar traumatic events in June 2017, when eight people died in the van and knife attack launched by three people inspired by the Islamic State group.