Police have detained a man who ran through a pub in Borough with what witnesses described as an AK47 gun.
ITV News producer Darren Burn was inside the George pub at around 2 o'clock this afternoon when the incident happened.
He tweeted what he saw:
Samuel, my uncle and I just had to get on the floor as a gunman ran through the pub we're in.
It happened at the George pub in Borough - a black man with a gun that looked like an AK47 ran through. Men started chasing him and shouting "get down he has a gun."
I have never had to get down on floor before. The whole moment was surreal and I didn't react fast enough. Samuel and my uncle hit the floor.
I called the police but they're still not here. Gunman was carrying a gun with a Sports Direct bag in tow.
Three armed police have now arrived and are pursuing suspect.
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Police have detained a man ran through a pub in Borough with what witnesses described as an AK47 gun.