LONDON - Closed-circuit television footage captured the final moments of the London Bridge attack as police cars dashed to the scene and three attackers were taken down.
The attackers on Saturday (June 3) stabbed and killed eight people. The attack left 48 injured, of whom 29 were still in hospital on Wednesday.
Health authorities said 10 were in a critical condition.
Attackers Khuram Butt, 27, Rachid Redouane, 30, and Youssef Zaghba, 22, were shot dead by the police as they carried out a stabbing spree in London's Borough Market after mowing down pedestrians with a van they drove across London Bridge.
The CCTV video, which surfaced on social media, looks as though it was shot off a computer screen using a mobile phone.
Sources have confirmed it is genuine, The Guardian said.
The footage shows the attackers rounding on a passer-by and stabbing him. The passer-by, a man, fell to the ground.
Then, a police car screeches into the scene and armed officers emerge.
The policemen shoot the terrorists even as the attackers come at them with knives.
In about 20 seconds the attackers are lying on the ground. Another police vehicle then arrives.
"In that time, as well as firing more than three dozen shots, the officers saw canisters draped around the upper body of the three attackers and assessed them to be suicide vests," Guardian reported.
The marksmen involved soon returned to duty, joining a manhunt as police believed there could still be attackers on the loose, it added.
By law, the police shooting of suspects has to be independently investigated by the Independent Police Complaints Commission (IPCC).
"We can confirm that 46 shots in total were fired by eight police officers - three officers from City of London police and five from the Metropolitan police service. We are examining CCTV footage from within Borough Market which we believe shows the majority of the incident relevant to our investigation," The Guardian quoted the IPCC as saying.