Police close off London's Westminster Bridge over unattended vehicle

British Army soldiers patrol the streets near Parliament in London, May 25, 2017.
British Army soldiers patrol the streets near Parliament in London, May 25, 2017.PHOTO: AFP

LONDON (REUTERS) - British police sealed off Westminster Bridge in central London next to parliament on Thursday (May 25) following reports of an unattended vehicle.

Officers initially blocked vehicles and pedestrians from the crossing, then let pedestrians through again soon after.

"Officers are in attendance," a police spokesman said.

Britain is currently on its highest alert level of critical meaning an attack by militants might be imminent following the suicide bomb attack in Manchester on Monday.

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In March, a man killed five people after driving into a crowd of pedestrians on Westminster Bridge in central London before stabbing a police officer in the grounds of parliament.