LONDON — British police responded to eyewitness reports late Saturday that a van plowed into pedestrians on London Bridge. There were also reports of a stabbing incident in nearby Borough Market. It was not clear if they were related.

On London Bridge, witnesses described seeing a white van mounting the sidewalk and injuring at least six people at about 10:30 p.m. local time. A BBC reporter who was on the bridge at the time said the van was driving around 50 miles per hour. Metropolitan police confirmed an incident but released few details.

"We are dealing with an incident on #LondonBridge, when we have more information we will update this twitter feed," they tweeted.

London Bridge was closed in both directions. Twitter users began uploading footage of police on the scene.

The BBC reports more than one person has died in the London Bridge incident.

In the incident at Borough Market, an area that houses many food stalls and pubs, witnesses told CNN that two men entered a restaurant and stabbed patrons. Police said armed officers had been sent to Borough Market and urged people to flee the area.

There were also reports of a third incident, in the Vauxhall area of London. There could be as many as three suspects.

The British Prime Minister's office said Theresa May is being regularly updated on the situation, and the White House said President Trump has been briefed.

Reports of the incident reflected fear that the incident could be terrorism. Britain has weathered two recent terrorism attacks in recent months. In March, four people were killed in London after Khalid Masood rammed his car into pedestrians on Westminster Bridge, before fatally stabbing a policeman outside the Houses of Parliament.

On May 22, a British-born suicide bomber killed 22 people and injured 59 others at Ariana Grande's concert in Manchester, England.