The knife-wielding London Bridge attacker was a terrorist jailed in 2012 over an al Qaeda-inspired plot to bomb the London Stock Exchange.
Usman Khan, 28, killed a man and a woman and injured three people, including a man and two women, during his rampage on Friday afternoon.
In February 2012, he was handed an indeterminate jail sentence over a terror plot, with the sentencing judge saying he should not be released until he was no longer a threat to the public.
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