Major incident declared in London
It's understood a man armed with a knife has attacked people on London Bridge.
A man has been detained by police and number of people have been injured following a stabbing near London Bridge, the Metropolitan Police said.
Footage on social media appeared to show armed officers with their weapons poised, while witnesses have reported hearing gunfire.
A police statement said: Police were called at 1:58pm to a stabbing at premises near to London Bridge.
Emergency services attended, including officers from the Met and the City of London Police.
A man has been detained by police. We believe a number of people have been injured. Further info to follow.''
Prime Minister Boris Johnson said: I'm being kept updated on the incident at London Bridge and want to thank the police and all emergency services for their immediate response.''
Home Secretary Priti Patel added she was very concerned''.
He said: Very concerned by ongoing incident at London Bridge. My thoughts are with all affected. I am grateful for the rapid response of our police and I urge everyone to follow their advice.'
A video has emerged showing police officers aiming guns at a white lorry that jackknifed across London Bridge.
The footage shows several officers surrounding the vehicle before moving to the rear to check its container.
London buses can be seen either side of the lorry while three police cars are parked next to it on the bridge.
Nurse Jackie Benfield, 32, described how she asked to be let off a bus on London Bridge after she heard "five or six'' gunshots.
Ms Benfield, who was on her way home from work, said she exited the bus and "ran like hell'' to escape the shots.
Connor Allen, who was in his van on the bridge when it was evacuated said: "Everyone just started running, you heard these pops and that was it. We just got out the van and started running."
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