One person has been arrested.
The Muslim Council of Britain tweeted that a van ran over worshippers as they were leaving the Finsbury Park Mosque after nighttime prayers.
“From the window, I started hearing a lot of yelling and screeching, a lot of chaos outside… Everybody was shouting: ‘A van’s hit people, a van’s hit people’,” one woman who lives opposite the scene told the BBC.
“There was this white van stopped outside Finsbury Park mosque that seemed to have hit people who were coming out after prayers had finished. I didn’t see the attacker himself, although he seems to have been arrested, but I did see the van.”
WATCH: Vehicle rams into Muslim worshippers leaving mosque in London: reports
The London Ambulance Service confirmed that it was sending vehicles and personnel to tend to the victims.
A Reuters witness saw at least one person being loaded into an ambulance. Another witness tweeted that police officers were frantically administering cardiac massage to victims on the ground.
WATCH: Police cordon off area where a vehicle reportedly hit several pedestrians in London, England
The incident comes on the heels of a series of vehicle attacks in London.
Earlier in June, eight people were killed and dozens injured after a van rammed into pedestrians on London Bridge, with the assailants also attacking people with knives.
In March, a man drove a car into pedestrians on Westminster Bridge and stabbed a policeman to death, killing five people in total before being shot dead.
– With files from Reuters