- Parliament suspended following terror incident
Updates on the terror incident at the Houses of Parliament will be continuing on the BBC live page: Westminster attack - latest updates.
Click on that link for unfolding news, which will continue there from our BBC colleagues.
A BBC reporter has tweeted the video of the statement made by Holyrood's presiding officer Ken Macintosh earlier as the Scottish Parliament suspended its debate on independence for the day.
BBC Live reporter
The Green MP for Brighton Pavilion is one of those locked in the Chamber of the Commons, while the security incident is dealt with.Quote Message: We were all in the process of voting when the doors were closed and we were told to get come into the main Chamber. It does feel very surreal to be honest and my heart goes out to all those involved. We live in difficult times and I just hope that people keep calm.' from Caroline Lucas MP (Green) Brighton Pavilion
- Copyright: BBC
The House of Commons and House of Lords have adjourned for today.
The annunciators - which deliver information for staff around the Palace of Westminster - advise staff to remain in their offices, while armed firearms officers carry out a sweep of the estate.
The building is in lockdown, they say.
- A policeman has been stabbed and his attacker shot by officers at the House of Parliament
- Police are treating it as a "terrorist incident"
- The attacker is reported to have mowed down several pedestrians as he drove a grey Hyundai car across Westminster Bridge before crashing it into railings
- He is then reported to have run through the gates of the Palace of Westminster and stabbed the officer
- Eyewitnesses said he was shot by police as he approached a second officer clutching his knife
- House of Commons and Lords in lockdown - as is nearby St Thomas's hospital
- Public urged to avoid the area and Westminster Underground station is closed
- Prime Minister Theresa May was seen being ushered into a silver Jaguar in the grounds of the Palace of Westminster as what sounded like gunfire rang out at around 14:45 GMT
- A Downing Street source confirmed the prime minster was "OK".
Holyrood suspends its sitting today, following news of the terror incident in Westminster.
The Scottish Parliament was debating the proposal for a second independence referendum, with a vote due at 5.30pm.
- Copyright: BBC
The police confirm a firearms incident on Westminster Bridge Road at 1440 GMT.
Downing Street say the prime minister is "safe".
A car has crashed in to the perimeter at Parliament on Westminster Bridge Road.
Commons leader David Lidington says a man attacked a police officer at Parliament and has been shot by police.
The House of Commons and Lords suspended until further notice.