This article is from the source 'bbc' and was first published or seen on . It last changed over 40 days ago and won't be checked again for changes.

You can find the current article at its original source at http://www.bbc.co.uk/news/uk-39408786

The article has changed 6 times. There is an RSS feed of changes available.

Version 0 Version 1
Westminster attacker 'drove up to 76mph' before attack Westminster attacker 'drove up to 76mph' during attack
(35 minutes later)
Police investigating last Wednesday's terrorist attack believe Khalid Masood was travelling at up to 76mph on Westminster Bridge where he killed three pedestrians, BBC London has learned. Police believe Khalid Masood was driving up to 76mph on Westminster Bridge where he killed three people, BBC London has learned.
Masood killed three people and injured 50 when he drove a car into pedestrians on Wednesday. He then fatally stabbed a police officer before being shot dead by police - all within 82 seconds. Masood also injured 50 people when he drove a car into pedestrians last Wednesday.
The Metropolitan Police Force has said it will not comment on this element of the ongoing investigation. He then fatally stabbed a police officer before being shot dead by police - all within 82 seconds.
The Metropolitan Police Force said it will not comment on this element of its ongoing investigation.
It is understood the car Masood used was seen driving in the area around Westminster Bridge at some point before the attack.
It may have been on the day or before that, although it remains unclear what the purpose of this was.
Masood's victims were PC Keith Palmer - who was stabbed outside the Houses of Parliament - Aysha Frade, who was in her 40s and worked at a London sixth-form college, US tourist Kurt Cochran, 54, and retired window cleaner Leslie Rhodes, 75, from south London.
On Saturday, the Metropolitan Police said they believed Masood acted alone but they were also "determined" to find out whether he had been inspired by terrorist propaganda.
However, Scotland Yard said it was possible they would "never understand why he did this".
It is understood Masood's phone connected with messaging app WhatsApp minutes before the attack, which police say started at 14:40 GMT and lasted just 82 seconds.
An image of Masood's Whatsapp status shows that he was "last seen" on the messaging service at 14:37.
The revelations have prompted a debate about the responsibilities of messaging services.
Home Secretary Amber Rudd said encrypted messages must be accessible to intelligence services fighting terror, stressing there must be "no place for terrorists to hide".
She is holding talks with other EU ministers in Brussels to discuss ways of preventing further attacks and will later this week meet technology firms.
A WhatsApp spokeswoman said the company was "horrified at the attack" and was co-operating with the investigation.
82-second attack