Summary
Masood drove a car through a crowd of pedestrians on Westminster Bridge, killing three and injuring about 50, then ran through the gates of Parliament and fatally stabbed a police officer, before he was shot dead by police.
Neil Basu, senior national coordinator for U.K. counterterrorism policing, said there was no evidence that Masood had been radicalized in prison in 2003 and it was pure speculation to suggest that had happened.
Masood, 52, was British-born and had several previous convictions for offenses such as grievous bodily harm, possession of a knife and public order offenses.
Media have reported that Masood sent an encrypted message moments before the attack.
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