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Live updates: Westminster attack investigation

Police and intelligence agencies are mounting a massive investigation to establish what led Khalid Masood to carry out the attack on Westminster.

There have also been calls for security services to get access to encrypted messages such as WhatsApp after it emerged that Masood used the messaging service moments before the attack.

Here is the latest on what we know:

  • Police have arrested a 30-year-old man in Birmingham in connection with the attack
  • Another man of 58 who was arrested on Thursday remains in custody
  • Scotland Yard have said the attack was over in just 82 seconds
  • They believe Masood acted alone and it may never be known why he did it
  • Masood ploughed a Hyundai i40 across Westminster Bridge and stormed the Parliamentary estate armed with two knives, fatally stabbing Pc Keith Palmer before being shot dead by police
  • Three other innocent people died in the attack on Wednesday
View all 44 updates ›

Westminster attack: Six arrested released from custody

Police outside a property in Didsbury, Greater Manchester on Friday. Credit: PA

Six people arrested in connection with the investigation into Wednesday's terror attack in Westminster have been released "with no further police action", Scotland Yard said.

A total of 11 people have been arrested since the inquiry was launched but only four remain in custody - two men aged 27 and 58 who were arrested in Birmingham on Thursday and a 32-year-old woman and a 35-year-old man who were arrested in Manchester on Friday.

All are being held on suspicion of preparation of terrorist acts.

The six released without facing further action are two women aged 21 and 26 and four men aged 23, 26, 27 and 28 who were all arrested at addresses in Birmingham.

A 39-year-old woman arrested in east London has been released on bail until late March.

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Live updates: Westminster attack investigation

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