Police believe 7 people are dead in addition to three attackers, following terrorist incidents at London Bridge and Borough Market in London.

Police conducted a raid on a block of flats in Barking, a neighborhood in London, and arrested 12 people in East London.

Police have identified at least one of the suspects.

Last night, a white van mowed down pedestrians on London Bridge.

Three attackers then emerged and began stabbing people at Borough Market.

Witnesses said the attackers wielded long knives, and one attacker reportedly had a "curved, foot-long knife."

Armed police responded with gunfire, killing the suspects.

The entire incident took just 8 minutes.

48 people have been taken to five hospitals across the city. 21 of them were still in critical condition by Saturday afternoon.

Prime Minister Theresa May made a strong statement condemning "Islamic extremism" and the internet services companies who give it "the safe space it needs to breed."

No group so far has claimed responsibility for the attacks.

See dramatic photos from the scene here.

London police said seven victims and three suspects are dead following terrorist attacks Saturday evening, when attackers in a white van mowed down pedestrians on London Bridge and then stabbed passersby at the nearby Borough Market.

At least 48 people were taken to five hospitals across London, according to the London Ambulance Service. Twenty-one were in critical condition 18 hours later.

Police killed all of the attackers involved in the incidents, according to Assistant Commissioner Mark Rowley. One suspect, seen in the image above, wore a close-cropped beard and wore an Arsenal away football shirt.

Rowley added that the scene is "complex" and authorities are still determining how events unfolded.

Police conducted a raid on a block of flats in Barking, London, on Sunday morning as part of that investigation, according to Sky News. The neighbourhood is home to many Muslims and it is common to see women wearing the burka there. Sky said the raid was on the home of one of the attackers. 12 people were arrested. Locals told Sky that they recognised a neighbour as the suspect who had been killed by police last night. For more on the identities of the suspects, click here.

Police vans leave carrying a number of women who were detained after a block of flats was raided in Barking, east London. REUTERS/Hannah McKay

Police action shut down several streets in the Barking area on Sunday afternoon.

Here is the Metropolitan Police's statement on the arrests this morning.

According to investigators, police first received reports of a vehicle striking pedestrians on London Bridge around 10:08 p.m. local time (5:08 p.m. ET), and the vehicle then drove to the nearby Borough Market just south of the bridge.

At that point, the three attackers — all of them male — left the vehicle and began stabbing people with what witnesses said were large knives. The three were initially confronted by a single unarmed police officer who was beaten to the ground by the men, according to Sky News. That officer survived the confrontation and is in stable condition in a London hospital.

Armed officers then arrived and shot and killed the suspects in Borough Market.

Prime Minister Theresa May made a strong — and possibly controversial — statement this morning, condemning "Islamic extremism" and the internet services companies who give it "the safe space it needs to breed."

"It is time to say `Enough is enough,'" May said. "When it comes to taking on extremism and terrorism, things need to change." Read Theresa May's full statement here.

US President Trump woke up this morning and tweeted a similar sentiment:

He also criticised London Mayor Sadiq Khan:

That's not exactly what Khan said. Here is the mayor's full message, in which he urges Londoners to remain calm:

Here is a look at the scene last night as it was ongoing:

Some of the eyewitness accounts of the attack are terrifying.

Lewis Bennett was in The Globe pub at London Bridge. (The Globe is the building in which Bridget Jones' flat is located in the movie.) He told The Guardian that one man came in dressed in a black robe, he carried a long, curved knife:

“Everyone gasped when he ran into the pub but he didn’t do anything at first, just stood still for about 10 seconds,” said Bennett. “But then he grabbed the knife and stabbed people closest to him. He stabbed people in the stomach and legs, I think about five or six people. People started screaming and running out the back door. He was shouting ‘Allah Akbar, Allah Akbar’ and he had a British accent.

“I went to go stand in the loo and I could hear all the screaming. I came back out and he was standing there right in the centre of the pub and all the blood was dripping from his blade.”

At 9.20 a.m. Cressida Dick, the commissioner of the London Metropolitan Police, gave an update on the attack:

It was "an appalling and tragic incident in London, something we hoped we would not see again," Dick said.

She has "visited one of the hospitals where the injured are being treated."

They "ran toward the danger as the incident unfolded. Many, many people risked their own safety to help others and to treat the injured, and indeed to confront the suspects involved," she said. "The courage of those people during and after the attack was extraordinary. ... I'm sure they helped to save lives."

"Our officers confronted the suspects and brought this terrible incident to a conclusion within 8 minutes."

"Seven members of the public have died. In addition, as you know, three suspects are dead. My current information is that 48 people have been injured. And 48 people were indeed taken to hospital for treatment."

Police responded "at 10.08 p.m. last night, to reports a vehicle had struck pedestrians at London Bridge," Dick said.

"That vehicle continued to drive from London Bridge to Borough Market. The suspects then left the vehicle, and a number of people were stabbed."

"The suspects were shot dead by armed officers."

"We believe that this incident is under control."

"However a large cordon remains in the area of London Bridge and Borough Market" while the police conduct "a thorough search of the area" ... "to make the whole area safe."

"I do appreciate this has been a terrifying experience for many people."

"To anyone currently within the cordon, our advice is to stay inside and we will be in touch."

"London Bridge station and the Underground is also closed."

"Avoid the area if you possibly can."

"This is a fast-moving investigation. ... we will have increased patrols in many areas … these will include armed officers."

People trying to locate their loved ones can call 0800 0961 233.

People with information about suspected terrorism can call this number: 0800 789 321.

The police are now working "to establish more details about the individual who carried out the attacks and the background to it," Dick said.

"Remain calm, please of course be very vigilant. If you see anything suspicious, anything at all, or if you are concerned about anyone at all, even if you think it is very insignificant," she said.

"He was stabbing a man, maybe three times, fairly calmly."

Witnesses had terrifying descriptions from the bars and restaurants in the area.

One man, Gerard Vowles, 47, had been drinking in a pub while watching the Champions League final between Real Madrid and Juventus. After leaving to get something to eat, he saw the terrorists stabbing a woman, and ran after them, throwing a chair, bottles, and a pint glass at them. He hit one of them with a chair.

“She was going, ‘Help me, help me’ and I couldn’t do nothing,” he told The Guardian. “I want to know if this girl is still alive. I’ve been walking around for an hour and a half crying my eyes out. I don’t know what to do.”

“I know it was a silly thing to do but I was trying to save people’s lives,” he said.

A witness named Ben told the BBC: "I saw a man in red with quite a large blade. I am guessing 10 inches. He was stabbing a man, maybe three times, fairly calmly. It looked like the man maybe had been trying to intervene but there wasn’t much he could do. He was stabbed quite coldly and slumped to the ground."

The suspects were wearing what appeared to be explosive vests, but those were later determined to be fake, Rowley said.

Rowley told media that the police department's counter-terrorism command is conducting a full investigation, and that the public should continue to avoid the London Bridge and Borough Market areas.

One on-duty police officer received serious, but not life-threatening injuries during the attacks, Rowley said.

So far, no group has claimed responsibility for the attacks.

Other events in a chaotic night include:

Ruby Rose, an actress from Orange is the New Black, was caught up in a locked-down part of London last night with her girlfriend Jessica Veronica from the band The Veronicas.

Four French citizens were injured.

Andrew Marr and Andrew Neil cancelled their Sunday morning politics TV shows on the BBC to allow rolling coverage of the attack

The major political parties said they would suspend campaigning in the general election, just four days before the vote.

Geoff Ho, a business editor at the Sunday Express, is in intensive care after being stabbed.

The van used in the attack appears to be a white rented Hertz vehicle

Saturday night’s terrorist incidents in London prompted the first use of a new police warning to the public, to “run, hide, tell” in the event of an attack.

Witnesses told the BBC they heard the attackers shouting, “This is for Allah. ”

” An incident in Vauxhall shortly afterward turned out to be unconnected.

Police attend to an incident on London Bridge in London, Britain, June 3, 2017. Reuters/Hannah McKay

British Prime Minister Theresa May labelled the incidents "terrible," and will chair a meeting of the government’s emergency response committee on Sunday, the Associated Press reported.

London Mayor Sadiq Khan released a statement calling the incidents "a deliberate and cowardly attack on innocent Londoners."

"I condemn it in the strongest possible terms. There is no justification whatsoever for such barbaric acts," Khan said.

US President Donald Trump was also briefed on the incident, and posted tweets offering the UK support from the US, and touting his travel ban that has been blocked by federal courts. "We need to be smart, vigilant and tough. We need the courts to give us back our rights. We need the Travel Ban as an extra level of safety," Trump wrote.

Trump later spoke with May over the phone, offering condolences and US support. He also praised the "heroic response of police and other first responders," according to a White House readout of the call.

One witness had seen people who may have had their throats cut

Media outlets reported scenes of chaos and violence during the attacks. Reuters reported that one witness had seen people who may have had their throats cut.

One taxi driver told the BBC he had witnessed three men emerge from the vehicle that "knocked loads of people down" on London Bridge.

"A van came from London Bridge itself, went between the traffic light system and rammed it towards the steps," the driver said. "Then three men got out with long blades, 12 inches long, and went randomly along Borough High Street stabbing people at random."

Media outlets later published a photograph that purportedly showed one of the attackers lying on the ground with what appeared to be canisters strapped to his body. The photographer, Gabriele Sciotto, told the BBC he didn’t think the canisters looked real.

Several hours after the incidents occurred, several explosions controlled and monitored by police were heard near London Bridge, according to an editor at The Sun.

Officers had also responded to a stabbing incident in the Vauxhall area Saturday evening, but later said it was unconnected to the London Bridge and Borough Market incidents.

Borough Market is a popular gourmet food market in the South London neighbourhood at one end of London Bridge. It is near the Shard, one of London's tallest skyscrapers and one if its most popular tourist destinations.

The London incidents come less than two weeks after a terror attack at an Ariana Grande concert in Manchester killed 22 people. A similar attack also occurred in March on London's Westminster Bridge, where a man killed five people after driving into pedestrians. He also stabbed a police officer.

People leave the area with their hands up after an incident near London Bridge in London, Britain June 4, 2017. REUTERS/Neil Hall

People ran into a bar and told patrons to run away because "people are stabbing each other."

Lara Al-Ostta witnessed the aftermath of the London Bridge incident. Al-Ostta told The Guardian she was having drinks with a friend at the Old Thameside Inn, which is located south of London Bridge, when people ran into the bar and told patrons to run away because "people are stabbing each other."

Stephen Tull was under the bridge when the attack happened. He said he heard a bang and ran up to the bridge to help. He said he saw one man jump out of a van and begin attacking people.

When Al-Ostta and her friend ran up to London Bridge, she said she and her friend were told by officers to run away. Al-Ostta provided video footage to The Guardian which showed at least three injured people being treated for their injuries on the bridge.

"I saw people moving, but we thought, fuck, this is a serious thing," Al-Ostta said.

People run down Borough High Street as police deal with a "major incident" at London Bridge on Saturday, June 3, 2017. AP

Londoners also reportedly sprang to the aid of those affected by the incidents, offering up food, shelter, or assistance.

The Royal Oak pub in Southwark offered shelter to people who had been evacuated from hotels inside the area police had blocked off, the Associated Press reported. One cab company also reportedly tweeted an offer to provide free rides to anyone stranded.

Here are some tweets from the scene:

In the aftermath of the attacks, police reportedly evacuated people from bars and restaurants in the vicinity of London Bridge and Borough Market. Here's a video of police entering a pub and ordering people to get down:

BREAKING NEW VIDEO: several London police officers enter bar at London Bridge telling people to get down. pic.twitter.com/bjq15uVEmN — The Rouser (@RouserNews) June 3, 2017

TV presenter Piers Morgan tweeted this:

This is what the scene at Brindisa, the best-known restaurant at Borough Market, looks like on a normal day:

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