The suspect who reportedly plowed his van into a crowd of people on late Sunday evening at Finsbury Park Mosque in North London, apparently screamed and shouted that he meant to take the lives of "all Muslims". A 48-year-old man has been arrested.
The man who died had already been receiving first aid from a member of the public, police said.
Imam Mohammed Mahmoud told reporters today that he and "other brothers" were able to prevent onlookers from beating up the suspect and held him until police arrived. He was taken to the hospital as a precaution. Congregants on the scene who were attending to the injured happened to see a police van driving by, so they flagged it down.
Police arrested Osborne on suspicion of commission, preparation or instigation of terrorism including murder as well as attempted murder after a auto ploughed into a crowd of pedestrians near a north London mosque. "An attack on one community is an attack on all of us", Police Commissioner Cressida Dick said.
Police said that one man had been arrested at the scene and that no further suspects had been identified.
Khan said there would be extra police to reassure communities, especially those observing Ramadan.
Local faith leaders stand together as they pose for photographers, near Finsbury Park Mosque, in a show of friendship following the attack outside the mosque, in London, Britain June 19, 2017. "Our prayers are with the victims", the Muslim Council of Britain (MCB), an umbrella body, said on Twitter.
British Prime Minister Theresa May says she will chair an emergency session of the security Cabinet later Monday.
"All my thoughts are with those who have been injured, their loved ones and the emergency services on the scene", she said.