Updated

Killer Khalid Masood was seen driving around Westminster in the lead-up to the London terror attack that saw him plow an SUV into crowds at 76 miles per hour, according to reports.

Khalid Masood in an undated photo. (Metropolitan Police via AP, File)

BBC journalist Danny Shaw today tweeted: “It’s understood car Khalid Masood used was seen driving in Westminster Bridge area at some point before attack – unclear exactly when & why.”

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It comes as police revealed Masood was traveling at up to 76mph on Westminster Bridge when he killed three members of the public.

He then stabbed hero cop Keith Palmer to death in an atrocity lasting 82 seconds.

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Frame-by-frame examination of CCTV footage by police revealed the astonishing speed at which Masood, 52, caused carnage — killing four people and wounding more than 50.

Within 72 hours, cops had made 11 arrests and were able to establish the twisted 52-year-old was not part of a wider cell.

The Sun also learned that Masood’s precise movements in the hours and days before the attack were swiftly pieced together by Automatic Number Plate Recognition cameras that picked up his hire car’s plate.

Masood, 52, killed four people in a murderous rampage outside Parliament last Wednesday.

The terror group ISIS claimed responsibility for the attack as Amaq news agency reported Masood was a “soldier of the Islamic state”.

Sun Online contacted the Met police, Westminster council and Lambeth council for comment.

The Met has said it will not comment on this element of the ongoing investigation.

This story first appeared in The Sun.