The United Kingdom Metropolitan police say they are responding to a second incident at Borough Market.
This is after the police confirmed reports of stabbings at Borough Market, where they say armed police have fired shots.
The police say officers are also responding to an incident in Vauxhall.
Guardian journalist Kate Lyon has spoken to witnesses at the scene at London Bridge, who report stabbings have taken place:
One of the men in the group holding their hands above their heads told me they had been in a restaurant basement until now. pic.twitter.com/C60xRtf9bn
— Latika M Bourke (@latikambourke) June 3, 2017
Lara Al-Ostta was having drinks with a friend at the Old Thameside Inn underneath London Bridge when she said people came running into the pub and telling everyone to run away because “people are stabbing each other”.
Al-Ostta said she ended running up on to London Bridge – and she and her friend were told by the police to run away. While on the bridge Al-Ostta took video, seen by the Guardian, of at least three injured people on the bridge, being tended to by emergency services.
“I saw people moving, but we thought…this is a serious thing,” said Al-Ostta.
Stephen Tull, who is homeless, was under the bridge at the time of the attack when he heard a bang. He says he ran up on to the bridge to help and saw one man who jumped out of the van and began attacking people.