Here's what we know so far about an incident in which a van drove into pedestrians near Finsbury Park Mosque, north London, in the early hours of Monday morning, injuring several people.
Witnesses described hearing the man, who was detained by members of the public at the scene, shout: "I'm going to kill Muslims".
IT comes just two weeks after the London Bridge terror attack, where radical Islamists used a hire van to mow people down in the capital.
- Police say they believe there was only one man in the van.
In a statement at 04:46 am they said the incident was being investigated by counter-terrorism police.
"There was this white van stopped outside Finsbury Park mosque that seemed to have hit people who were coming out after prayers had finished".
He said: "Given we are approaching the end of the month of Ramadan and the celebration of Eid with many Muslims going to local mosques, we expect the authorities to increase security outside mosques as a matter of urgency".
Police say the driver of a van that hit pedestrians on a London road is a 48-year-old man who has been arrested and taken to a hospital.
London Mayor Sadiq Khan called it an "horrific terrorist attack" and counter-terrorism police are leading the investigation, as Muslim leaders linked the incident to a rise in Islamophobic crime.
Shadow home secretary Diane Abbott, whose north London constituency is close to the mosque, said the police "must urgently review security for all mosques".
The crash occurred near the Finsbury Park mosque.
Photos show a number of police cars are on the scene and the area cordoned off to civilians.
- Two eyewitnesses tell CNN they saw three men in the van.
"This is being treated as a terrorist attack".
"My prayers are with the victims and their families". "One has been arrested and two ran away", he added.
"They were very nervous, shouting very loud, trying desperately to make some signs to a police vehicle that was. just passing the road", she told CNN.
Britain's terrorist alert is set at "severe", meaning an attack is highly likely, Sky News reported.
"As the local MP, I have met with Muslim community leaders at the Muslim Welfare House alongside Islington Council Leader Richard Watts, the council's Chief Executive Lesley Seary and the Metropolitan Police. An attack on one community is an attack on all of us", said Police Commissioner Cressida Dick.