The man who was being given first aid at the scene before the attack had died but it was not clear whether his death was directly linked. "By God's grace we managed to surround him and to protect him from any harm", Mahmoud told reporters.
The Metropolitan Police Service, already stretched by investigations of the earlier attacks and a high-rise apartment fire that killed at least 79 people, said it was putting extra patrols on the streets to protect the public.
There's been another terrorist attack in London and once again it was executed with a van.
Police arrested Osborne on suspicion of commission, preparation or instigation of terrorism including murder as well as attempted murder after a vehicle ploughed into a crowd of pedestrians near a north London mosque.
Ali Habib, a 23-year-old student, said residents were upset that Monday's attack wasn't portrayed in the same light as other attacks across Britain.
May said: "Hatred and evil of this kind will never succeed".
Transportation officials said roads in the area were being closed.
The Muslim Council of Britain umbrella group said it expected increased security "as a matter of urgency". "People are both scared and angry".
"Sending love and prayers to the victims in #FinsburyPark London".
Afghan Army: Around 700 ISIS Fighters Killed in Last Three Months
USFOR-A estimates the group is comprised of fewer than 1,000 fighters who are mostly restricted to Nangarhar. Islamic State-Khorasan recently chased the Taliban away from Tora Bora, a one-time Osama bin Laden hideout.
When he woke at about 1 a.m.to the sound of a helicopter circling overhead, Hornak said, his first thought was another terrorist attack.
One man was pronounced dead at the scene and eight others were taken to hospital. "These are the values that define this city", she said later outside Downing Street.
Finsbury Park Mosque said it was a "callous terrorist attack" and noted it had occurred nearly exactly a year after a man obsessed with Nazis and extreme right-wing ideology murdered lawmaker Jo Cox, a former humanitarian aid worker. However, the mosque was shut down and reorganized and has not been associated with radical views for more than a decade.
She later visited Finsbury Park Mosque where she held talks with faith leaders.
Britain's terrorist alert has been set at "severe" meaning an attack is highly likely.
A woman holds a sign reading "Leave our Muslim Neighbours Alone", as she stands near the scene in Finsbury Park area of north London after a vehicle was driven into pedestrians, on Monday. Police shot and killed the three Islamic extremists who carried out the attack.
The pedestrians had been helping a man who had collapsed. He was also killed by police.
Manchester was hit by a deadly attack on May 22 when a suicide bomber killed 22 people at an Ariana Grande concert.