WATCH: 3 bystanders take down London Bridge attacker with Narwhal tusk and fire extinguisher

Ordinary Londoners took down a knife-wielding attacker on London Bridge. The attack was savage – two of the victims have died and three are in hospital.

The attacker, 28-year-old Usman Khan, had recently been released after serving half of his 16-year prison sentence for plotting to blow up the London Stock Exchange.

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These heroic bystanders prevented Khan from harming even more people.

Warning: This footage may be disturbing for some people to watch.