UK Today Live
A number of people are believed to have been injured after a stabbing at London Bridge, police have said.
The Met Police said they were called to a stabbing at a premises near the bridge just before 14:00.
The force said it had detained a man. London Ambulance Service has declared a “major incident”.
John McManus, at the scene, said he had seen a group of men in a fight on the bridge. Police then arrived and shots were fired, he said.
British Transport Police said London Bridge station was currently closed and no trains would be stopping there.
Police have advised people near the scene to follow directions from officers on the ground.
The prime minister tweeted he was being updated on the incident and wanted to thank police and all emergency services for their response.