LONDON, June 4 (Xinhua) -- Metropolitan Police Assistant Commissioner Mark Rowley on Sunday made a statement with more details about the London attack.
He says 50 bullets were fired by eight officers, Sky news reported.
He said: "Three armed men wearing what appeared to be suicide belts. I'm not surprised that faced with what appeared to be suicide attackers, they fired what was an unprecedented number of rounds.
"A member of public also suffered a gunshot wound. Several people have been killed. Work to identify them will take some time as some are from abroad."
An IPCC investigation would take place, but he said that the situation officers faced was "critical".