Several pedestrians have been injured after being hit by a van in a "major incident" near a mosque in London.
Witnesses said the vehicle veered off the road into worshippers leaving prayers in Finsbury Park shortly after midnight.
“From the window, I started hearing a lot of yelling and screeching, a lot of chaos outside," a woman who lives opposite the scene told the BBC.
"Everybody was shouting: 'A van's hit people, a van's hit people'.
“There was this white van stopped outside Finsbury Park mosque that seemed to have hit people who were coming out after prayers had finished.”
Footage showed injured people motionless on the pavement as angry crowds surrounded a white man believed to be the driver.
A witness told Buzzfeed News up to 10 people were injured, before passers-by managed to restrain the driver after he left the van.
The man said a crowd had previously stopped to help an elderly man who collapsed on the pavement and was undergoing CPR when the vehicle approached.
A spokesperson for the Metropolitan Police said officers were called to a "major incident" at 12.20am.
"Officers are on the scene with other emergency services," he added. "There are a number of casualties being worked on at the scene. There has been one person arrested. Enquiries continue."
Police did not confirm claims Muslims were targeted after leaving a mosque following Tarawih prayers performed for the Islamic holy month of Ramadan.
Harun Khan, Secretary General of the Muslim Council of Britain, said: “Shocked and outraged to hear a van has intentionally run over worshippers leaving Ramadan night prayers.”
As unconfirmed reports swirled, former EDL leader Tommy Robinson, real name Stephen Lennon, was condemned for "attempting to justify" the attack by accusing the mosque of past links with extremists.
“I genuinely hope the innocent people targeted tonight outside the mosque are ok,” he later wrote on Twitter.
It was unclear whether worshippers had been leaving the Finsbury Park Mosque or nearby Muslim Welfare House, which said the incident happened "five minutes from us".
Mohammed Shafiq, chief executive of the Ramadhan Foundation Muslim organisation, said the incident came as members of both mosques left prayers.
“It happened outside the Muslim Welfare House but people were leaving Finsbury Park Mosque as well so there’s a lot of confusion at the moment,” he told The Independent.
“According to eyewitnesses it was a deliberate attack against innocent Muslims, and if that’s confirmed by authorities it should be classed as a terror attack, no doubt about that.”
The London Ambulance Service did not immediately confirm details of casualties.
Its deputy director of operations, Kevin Bate, said ambulances, advance paramedics, special response teams and an advance trauma crew had been sent to the scene.
"Our priority is to assess the level and nature of injuries and ensure those in the most need are treated first and taken to hospital," he added.
Part of Seven Sisters Road has been closed as the operation continues.
It came weeks after three Isis supporters rammed a van into pedestrians on London Bridge before rampaging through Borough Market with knives, killing eight people before being shot dead by police.
It was the third major incident in weeks for London's emergency services, following the London Bridge attack and Grenfell Tower disaster, which killed at least 58 people.
