In Excess of one person has confirmed died in a terrorist attack in central London which is still ongoing, the Metropolitan Police has said.
The Incident Happened at 22:08 BST, Police and ambulances were alerted to reports a van had hit people on London Bridge.
In response to reports of stabbings in the area which is known for its restaurants and bars, Armed officers later went to the nearby Borough Market in response to reports of stabbings in the area known for its restaurants and bars.
At least 20 people have been taken to hospital, said London Ambulance Service.
A number of people were treated at the scene for less serious injuries.
The Metropolitan Police tweeted: “At 0025hrs 4/6/17 the incidents at #LondonBridge & #BoroughMarket were declared as terrorist incidents.”
The incidents was described as “dreadful events” by Prime Minister Theresa May and she will hold a meeting of the government’s Cobra emergency committee later.
Home Secretary Amber Rudd said the attacks were “horrific” and “targeted at people enjoying their evening with friends and family”.
“We don’t yet know the full details, but this was a deliberate and cowardly attack on innocent Londoners and visitors to our city enjoying their Saturday night. I condemn it in the strongest possible terms.”, said London Mayor Sadiq Khan.
Eyewitnesses informed that they saw between two and four people getting out of the van after the attack on the bridge and running towards Borough Market.
One social media user has posted a photograph appearing to show one of the attackers lying on the ground outside a pub in the food market while gunshots were heard in the area, with what seemed to be canisters strapped to his body.
Almost two weeks after 22 people died in a suicide bombing at a concert in Manchester, the attack comes in London Bridge.
In March, five people died in London when a car was driven at pedestrians on Westminster Bridge and a police officer was stabbed outside Parliament.
‘Van hit five people’
A security guard who oversees a number of pubs in the London Bridge area said that he saw four people stabbed by three attackers.
Another eyewitness, Holly Jones, who was on the bridge at the time of the attack, said a van driven by a man was “probably travelling at about 50 miles an hour” before it hit a number of people.
“He swerved right round me and then hit about five or six people. He hit about two people in front of me and then three behind,” she said.
“There were five or six people being treated for injuries after the vehicle mounted the pavement and hit them”, she added.
“I’d say there are about four severely injured people. They all have paramedics assisting them at the moment.”
The van came from the direction of central London and it headed towards the south side of the river, she continued.
Ms Jones later reported seeing a man being arrested by police. She said he was handcuffed and had his shirt off.
She said a French woman was among the injured. She had said she did not know where two people she had been with were.
Will Orton described being in a pub in the area and seeing people coming running inside.
“We didn’t really know what was going on. We thought maybe there was a fight or something outside. And then there were almost hundreds of people coming inside.”, he said.
“The bouncers did a really good job, they shut the doors and locked everyone in. There was panic – it seemed like it was literally outside the door. People were coming inside and saying they had witnessed people being stabbed.”
The prime minister, Theresa May said: “Following updates from police and security officials, I can confirm that the terrible incident in London is being treated as a potential act of terrorism.”
“This is a fast-moving investigation. I want to express my huge gratitude to the police and emergency services who are on the scene. Our thoughts are with those who are caught up in these dreadful events.”, she added.
Downing Street said Mrs May, who has been campaigning in the general election, returned to No 10 to receive further briefings from security officials.
On Twitter, Labour Party leader Jeremy Corbyn described the incidents as “brutal and shocking”.
London Bridge has been closed in both directions, while neighbouring Southwark Bridge has also been shut, said Transport for London (TfL).
There were further closures in Borough High Street, where armed police and counter-terrorism specialist forces were later seen. On the north side of the river, road closures included Lower Thames Street and part of Cannon Street.
Police said earlier they were also responding to an incident in the Vauxhall area a few miles away but later confirmed it was not connected to the London Bridge attacks.