Neighbours in the Cardiff suburb where he had lived for several years described him as "aggressive" and "strange".
According to APP, worldwide media has named the suspect Darren Osborne, father of four, who witnesses said shouted: "I want to kill all Muslims", while mowing down worshippers near a mosque in the Finsbury Park.
"What I can say on this case is this individual, so far as we know at the moment, was not known to us, but we are aware of a rise in the far right, "Wallace told The Guardian".
Prime Minister Theresa May, who was heavily criticised for failing to meet survivors of a devastating fire in a London tower block last week, visited Finsbury Park Mosque where she met local faith leaders. On Saturday, Osborne had been thrown out of the Hollybush pub after drinking heavily and getting into an argument. It was chilling but not, in the Finsbury Park neighborhood, entirely unexpected.
He reportedly shouted "I want to kill Muslims" as he drove a van into a crowd of worshippers outside the Finsbury Mosque. "I did my bit".
Osborne was taken into custody and arrested for attempted murder.
Mohammed Mahmoud, the imam from the Muslim Welfare House, stepped in to ensure the van driver was not hurt until he was bundled into a police van.
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"In a statement given to local media on behalf of Osborne's family, his nephew Ellis Osborne said: "We are massively shocked; it's unbelievable, it still hasn't really sunk in".
Eyewitnesses reported seeing police give emergency heart massage to at least one of the injured.
"He came in here and he was just staring before he started shouting", he said.
Prime Minister Theresa May described what happened as a "sickening attempt to destroy freedoms" in the United Kingdom.
"Together with people all over this country, I am appalled at the deliberate attack on people leaving their late-night prayers, as the end of their day of fasting, at the mosque in Finsbury Park", said Nichols in a June 19 statement. Three of the injured are in critical care.
Describing the attack, Mr Mahmoud said he saw a crowd of people helping a man who had collapsed on the street.
The Harry Potter author has pointed out on social media the stark differences between how the terrorist incident had been reported in the press in comparison to the reporting of the terrorist attacks in London Bridge and Ariana Grande's concert in Manchester.