A man has died and eight people have been injured after a van ploughed into pedestrians near a north London mosque.
The van mounted the pavement and struck a group of people just after midnight near Finsbury Park Mosque in Seven Sisters Road. A 48-year-old man has been arrested.
Prime Minister Theresa May said police were treating it "as a potential terrorist attack".
The Muslim Council of Britain said a van intentionally ran over worshippers.
Eyewitness Abdul Rahman told the BBC he struck one of the attackers and helped subdue him.
"When the guy came out from his van he wanted to escape, run away and he was saying 'I want to kill Muslims. 'I want to kill Muslims.'
"I hit him on his stomach... and then me and the other guys... we held him to the ground until he couldn't move. We stopped him until the police came."
Counter-terrorism officers are at the scene, the Metropolitan Police said.
-BBC