Witnesses described how the driver of the vehicle shouted "I want to kill all Muslims" as the vehicle mounted a sidewalk and ploughed into a group of worshippers as they left a welfare center at the mosque where Muslims had just broken their Ramadan fast.
This is not the first time Finsbury Park mosque has been targeted. The 48-year-old terrorist was caught by the crowd and afterwards, he was brought in for interrogation by the British Police.
Police have not yet determined whether the fatality was a result of the van attack. According to witnesses, he screamed that he wanted to "kill all Muslims".
The Met Police have urged anyone with information to come forward. Eight of the injured were taken to hospitals and the rest were treated at the scene.
Eight people were killed on June 3, when a van drive into people on London Bridge before three attackers stabbed victims around nearby Borough Market.
"All the victims were Muslim and there are now no- other suspects", he added.
Prime Minister Theresa May is due to chair an emergency meeting on Monday morning, after police confirmed the incident was being treated as a "potential terrorist attack", she said. The statement from her office said her thoughts were with the injured, their loved ones and emergency services who responded to the scene.
London Mayor Sadiq Khan condemned the attack.
"We are in the last 10 days of [the Muslim holy fasting month of] Ramadan and a lot of people come to the mosque to pray the late prayer", he said.
Police said the driver has been taken to hospital "as a precaution" and will undergo a mental health assessment.
"Extra officers are on duty in the area to help reassure the local community", Police Commissioner Cressida Dick said.
"Many will feel terrorized, no doubt be angry and saddened by what has taken place tonight".
A second video that emerged online captured the moment police escorted the suspect to a riot van, while distraught onlookers shouted: "Why did you do that?" "And then the guy got out of the van saying, "where is all Muslims". "I saw everything. People were badly injured. He did not say anything".
The London Ambulance Service said it had sent a number of resources to the scene.
"An advance trauma team from London's Air Ambulance has also been dispatched by auto", the statement said.
A van has collided with pedestrians outside the well-known Finsbury Park Mosque in London, injuring several people. "An advance trauma team from london's air ambulance has also been despatched by vehicle", read the statement. He complained that the "mainstream media" was unwilling to call the attack a terrorist incident for many hours.