Reported the UK's Sun: 'There have been reports of two to three men armed with knives stabbing people at random'.
I saw this van going left and right trying to hit as many people as he could.
First reports of the incident emerged shortly after 10.10pm local time (7.10am AEST). Witnesses say the attackers encouraged them to film the scene as they shouted "Allah Akbar" ("God is greatest") before being injured and arrested by police.
London Bridge is closed in both directions as a result of the incident.
In March, a knife-wielding man went on a deadly rampage in the heart of Britain's seat of power, plowing a auto into pedestrians on London's Westminster Bridge before stabbing a police officer to death inside the gates of Parliament. She said she saw at least four or five people on the ground.
London Ambulance said multiple resources were attending the area.
The Department of Homeland Security issued a statement in which an official said the agency is "closely monitoring the ongoing situation" and that DHS Secretary John Kelly has been briefed on the incidents and the ongoing response.
The man with the knife stabbed a waitress, who was hiding behind a partition, in the neck and stabbed a man in the back before running out of the restaurant, the witness said. So the police are checking the Thames.
One witness reported having seen a van crashed into a lamppost after the bridge by the Barrowboy and Banker pub.
It also comes less than two weeks after a suicide bomber killed 22 people at a pop concert by US singer Ariana Grande in Manchester in northern England. Police officers yelled at people to run from the area.
In the incident at Borough Market, a nearby area that houses many food stalls and pubs and is popular with tourists, Metropolitan police said armed officers had been sent to the area after reports of stabbings at a restaurant.
Police have advised people to keep away from the area.
A concert in honour of the Manchester victims is due to take place on Sunday evening.