A van ploughed into worshippers leaving a London mosque this morning, injuring 10 people in what witnesses said was a deliberate attack on Muslims.

One man, who was already being given first aid at the scene before the vehicle was driven into pedestrians, has died but police said it was not clear whether his death was directly linked.

Eight others are in hospital, with two in a very serious condition.

According to one eyewitness, the suspect jumped out of the van and screamed "I'm going to kill all Muslims" before he was tackled to the floor.

Footage has since emerged of the handcuffed van driver blowing a kiss to onlookers from the back of a police vehicle.

Police confirmed a 48-year-old man has been arrested on suspicion of attempted murder and counter-terror cops are now investigating.

Officers said they are not seeking any more people beyond the one man arrested and confirmed they are treating the incident as an act of terrorism.

The horrific incident comes just weeks after a series of terrorist attacks in Westminster, Manchester and London Bridge.

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"This had all the hallmarks of a terrorist incident," said Neil Basu, senior national co-ordinator for counter-terrorism policing. "This was an attack on London and all Londoners."

Witnesses described seeing police giving emergency medical treatment to victims after the incident at 12.20am on Monday in Seven Sisters Road, north London.

Many of the victims are believed to have just finished worshipping at the Finsbury Park mosque after breaking the Ramadan fast.

Abdulrahman Saleh Alamoudi said he was among a group of people helping an elderly worshipper who had fallen down when a van swerved towards them.

He told BuzzFeed News: "This big van just came and went all over us.

"I think at least eight or 10 people got injured. Luckily I managed to escape. And then the guy came out of his van and I got him.

"He was screaming, he was saying, 'I'm going to kill all Muslims, I'm going to kill all Muslims'. He was throwing punches.

"Then we managed to get him on the floor. Then he was saying, 'Kill me, kill me'. I said, 'We are not going to kill you. Why did you do that?' He wouldn't say anything."

Van ploughs into pedestrians at Finsbury Park Mosque

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Salah Alamoudi said eight people were hit and up to three of them were in a "life-threatening" condition.

He said that they had to hold the suspect on the ground for up to half an hour before police arrived.

"The guy, I had to keep him at least half an hour. He was a strong guy. A big man," he said.

"It was heartbreaking. It wasn't an accident."

The Muslim Council of Britain confirmed worshippers had been targeted in the attack.

A message on the council's Twitter feed read: "We have been informed that a van has run over worshippers as they left #FinsburyPark Mosque.

"Our prayers are with the victims."

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Video posted online of the aftermath of the attack showed a scene of chaos as people tried to help the injured.

One man could been seen giving CPR to a victim in the street while another man's head injury was treated with a makeshift dressing.

People could be heard shouting and screaming amid the chaos and bloodstains were visible on the pavement.

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Witnesses at the scene said an elderly man who had collapsed at a bus stop was being tended to when the vehicle struck pedestrians.

A dozen police officers stood guard on a balmy Monday morning at the cordon at the junction of Yonge Park and Seven Sisters Road while several locals looked on.

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One man, who gave his name as Mohin, said his cousin was caught up in the incident.

The 32-year-old said: "There were a lot of people in the street, crossing the street, going to mosque for prayers, for forgiveness, just to pray and go home and eat.

"They are doing their usual daily routine - they did not expect a van coming out of nowhere hitting them.

"It was around 11.30pm, 12-ish. I've been living here all my life. As a community, everyone's a family here.

"I initially thought it was my cousin."

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Andrew, a courier who did not wish to give his surname, said he saw three people on the floor and at least one of them appeared to be in Muslim dress.

The 45-year-old, of St Albans, Hertfordshire, said he was driving back from a night shift when he saw the aftermath of the collision.

He said: "When I drove past slowly I could count three people on the floor and police were performing CPR on one of them.

"The guy having CPR performed on him was in a gown, ethnic clothing."

An eyewitness who lives on Seven Sisters Road told the BBC there were people "shouting and screaming".

She added: "Everyone was shouting 'a van's hit people'.

"There was this white van stopped outside Finsbury Park Mosque that seems to have hit people who were coming out of the mosque after prayers finished."

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One resident said he jumped out of the way as the van struck pedestrians.

The man, who did not want to be named, said: "The gentleman went straight down this road, people were just conversing, talking, just doing what we're doing.

"And he just came into all of us.

"There was a lot of people. We got told to move straight away.

"I was shocked, shocked, shocked. There were bodies around me.

"Thank God I just moved to the side, I just jumped. Everyone is hurt. Everyone is actually hurt."

Pictures posted on social media showed more than a dozen emergency vehicles near the UKCG Help Centre at the junction of Seven Sisters Road and the A503 Tollington Road.

Images on social media appeared to show a white man with black hair being arrested beside a van.

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This incident comes after two terror attacks in London - one in Westminster, the other London Bridge - in a matter of weeks.

Finsbury Park mosque used to be infamous as the stamping ground of hook-handed hate preacher Abu Hamza.

A number of terrorists were linked to the mosque, including shoebomber Richard Reid, who attempted to detonate explosives on an American Airlines flight from Paris to Miami in 2001.

It was raided and shut down and later reclaimed by the local Muslim community, who have transformed it into a place which actively promotes better community relations across faiths.