London Bridge terror attacks: What we know

"We believe three people were involved, but we still have got some more inquiries to do to be 100 per cent confident in that", he said.

"And at least 20 casualties have been taken to six hospitals across London", he said.

A white van riding on London Bridge mounted the sidewalk and mowed down pedestrians shortly after 10 p.m., sparking chaos in the city, according to multiple news reports citing eyewitnesses.

The incidents took place on London Bridge and in nearby Borough Market.

Soon after they responded to a stabbing in the Vauxhall area, over a mile away, but they said that incident is not connected to the others.

"Armed officers responded and shots have been fired", police said. They heard gunfire and were later told by authorities that they were in an unsafe area and evacuated.

Bystanders who witnessed Saturday night's attack on Borough Market, near London Bridge, said they tried to stop the assailants from stabbing people by pelting them with glasses and bottles and hurling tables in their direction.

Witnesses have reported seeing people hit by a vehicle on London Bridge.

Emergency response after the recent terrorist attack in Manchester.

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.

The van was traveling at approximately 50 miles per hour when the incident took place, according to BBC reporter Holly Jones who was at the scene and witnessed the crash.

The Australian Government has condemned the "shocking" attacks and offered support, while Donald Trump has repeated his calls for a travel ban in the wake of the incidents. "We saw a crashed van", he said.

It comes less than three months after an attacker ran down people with a vehicle on Westminster Bridge, killing four, then stabbed a policeman to death outside Parliament.

"We are reviewing and planning to strengthen our policing stance across London over the forthcoming days", said the release from Rowley.

United States pop star Ariana Grande whose concert in Manchester last month was the scene of a deadly suicide bombing, tweeted simply: "Praying for London".

One woman told Reuters she saw what appeared to be three people with knife wounds and possibly their throats cut at London Bridge at the Thames river.

"Whatever the United States can do to help out in London and the U.K., we will be there", Trump wrote.

"We saw people running, people lying down".

Five or six people were treated for injuries after the vehicle mounted the pavement and hit them, she said.

A speeding van ploughed into pedestrians before three attackers began stabbing people.

Witness Eric was on the south side of London Bridge when he saw the van on the wrong side of the road.

The first question after the deadly London terror attacks Saturday is, of course: Who is responsible?

" Britain raised its terror threat to the highest level of "critical" and deployed troops on the streets on May 23, a day after the Manchester suicide attack. There can be no justification for such attacks against innocent civilians", said the ministry in a media release on Sunday.

  • Leroy Wright