There are police officers, dogs, and ambulances at the scene.
The Old Vic theatre in central London has been evacuated.
It's not immediately clear what the reason is, and attendees, staff, and cast members have been led to the Imperial War Museum nearby.
Photos and videos posted on Twitter show a police cordon around the building and officers investigating.
One attendee told Business Insider there were "police, dogs and ambulances everywhere. Very weird and scary."
Alicia Melville-Smith, a BuzzFeed News reporter who was evacuated from the venue, wrote on Twitter: "Police are searching bins in the nearby park. Just overheard an officer say nothing has been found so far ... Shops and pubs nearby also evacuated. Closing doors to Waterloo station on the Waterloo Road side."
Here's a photo of the displaced crowd outside the Imperial War Museum:
The evacuation of the Waterloo venue comes at a period of heightened tensions in Britain, less than a week after a suicide bombing at the Manchester Arena killed 22 people and injured another 120.
This story is developing ...
There are police officers, dogs, and ambulances at the scene. Read Full Story
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