There were a number of casualties at the scene and a 48-year-old man was arrested after being detained by a member of the public, police said.
"An attack on one community is an attack on all of us".
But the Met said: "At this early stage of this investigation, no other suspects at the scene have been identified or reported to police, however the investigation continues".
- Police say they believe there was only one man in the van. They are investigating the crash as suspected terrorism.
- Prime Minister Theresa May will chair an emergency meeting Monday morning.
"The attack unfolded whilst a man was receiving first aid from the public at the scene; sadly, he has died".
The newspaper said the arrested man is "white with black hair". Speculation has also mounted that there may have been in total three men involved in intentionally running down worshippers, with one in custody and the other two on the run according to the dailymail.
The crash occurred shortly after midnight, when police received reports of a collision between a van and pedestrians.
The incident comes at a time when Londoners are on edge. Earlier this year, a man plowed into pedestrians on Westminster Bridge, killing four people before stabbing a police officer outside Parliament.
The neighbourhood has two mosques, and several hundred worshippers would have been in the area after attending prayers as part of the Muslim holy month of Ramadan.
He said he had been in contact with police, community organisations in the area, Labour leader Jeremy Corbyn and the leader of the local council Richard Watts. The witness also added that most of those who were struck down by the van were male and it happened soon after the end of prayers.
One of those, Adil Rana, 24, said: "The driver jumped out and then he was pinned down to the floor and people were punching him and beating him, which was reasonable because of what he's done".
- Islington's Seven Sisters Road, where the attack took place, is home to at least four mosques, and would have likely been filled with worshipers leaving late-night taraweeh prayers. Approximately 120 others were injured in the blast.
"The gentleman went straight down this road, people were just conversing, talking, just doing what we're doing".
"Some big van ... crushing the people in the mosque".
"I managed to put him to the ground until police came", Mr Aidroos said.
Eyewitness Boubou Sougou told Guardian reporter Vikram Dodd that the driver "deliberately piled into people on the pavement".
Bystanders wrestled a suspect to the floor. "An attack on one community is an attack on all of us", said Police Commissioner Cressida Dick. "He punched me in the head".
- McIlroy motivated by 'busy summer' after missing US Open cut
- PM May nears DUP deal
- Little-known Koepka Wins US Open Golf Championship
- Lions new boys handed Chiefs role
- Trump cries witch hunt amid Russian Federation probe
- Pakistan outclass England to reach final of ICC Champions Trophy 2017
- Ruggedman: Ronaldo Return To United Would Be 'Transfer Of The Decade'
- Stay put? Deadly London fire puts scrutiny on high-rise rule
- Top 3 on the wrong side of history at 117th US Open
- Talks on propping up UK PM May's Conservatives are 'very positive'