Scotland Yard was looking for three men who reportedly arrived at London Bridge around 2210 GMT and stabbed people randomly. She said at least one man had been arrested by the police.US President Donald Trump has also been informed, his press secretary announced.Police responding to multiple incidents near London Bridge."I saw people moving, but we though, f-, this is a serious thing", Al-Ostta said.
"We saw injured people on the road, injured people on the pavement", witness Will Heaven told Sky News.
Mark Rowley, assistant commissioner of London's Metropolitan Police Service, said the attackers were shot and killed by police.
British Prime Minister Theresa May said authorities were dealing with a "terrible incident" and London's Metropolitan Police Service said incidents at London Bridge and nearby Borough Market were being treated as terrorism.
British police said more than one person had been killed at London Bridge in first of multiple incidents in central London on Saturday night.
She said she saw a man lying on the floor with his shirt off and "lots of police were near him".
Prime Minister Theresa May's Conservative Party suspended national campaigning on Sunday for the upcoming June 8 United Kingdom election, a spokesman for May said following an attack in London which killed six people.More news: Rihanna Was The Real Star Of NBA Finals Game 1
"The situation is still unfolding and I would ask all Londoners and visitors to our city to remain calm and vigilant". Police officers yelled at people to run from the area.
And then terror struck yet again at London's heart as a van smashed into pedestrians and a stabbing rampage saw more bloodshed on the streets of the British capital.
The attacks came days before a general election and two weeks after 22 people were killed when a suicide bomber targeted an Ariana Grande concert in Manchester.
Just after 10pm police responded to reports of the vehicle colliding with pedestrians on London Bridge.
His sister, Freddy, says he's in an induced coma after being stabbed in the face, neck and stomach.
- Witnesses said shots were heard about 10 minutes after the bridge incident.
The Prime Minister will chair a meeting of the government's emergency response committee on Sunday, the Guardian reported.
The London Ambulance Service says they're working to quickly give help to those who need it.More news: Donald Trump Tweets Typo "Covfefe"
"Armed officers responded and shots have been fired", police said.
Liam Connell was in Katzenjammers Bierhall in Southwark Street, where customers were told to evacuate by staff before armed police told them to get on the ground.
At 0025hrs 4/6/17 the incidents at #LondonBridge & #BoroughMarket were declared as terrorist incidents.
The US embassy in London tweeted: "Please avoid the area and monitor local news/@metpoliceuk for updates".
Just minutes before Saturday's terror attack in London, pubs were crammed with revellers enjoying a balmy summer night out in a trendy part of the city, many of them watching the Champions League final on big screens.
The vehicle continued to drive to Borough Market, where the attackers left the van and a number of people were stabbed, including a police officer.
She later learnt that events of the London terror attacks were taking place directly outside her apartment.More news: Real's remarkable Ronaldo again delivers when it matters
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- Report of Multiple Casualties in Incident on London Bridge