The suspected shooter, 29-year-old Faisal Hussain, is a Toronto resident. He shot and killed two people and injured 13 others in Toronto's Greektown neighborhood Sunday night.

 

The ISIS, through the group's AMAQ news agency, had claimed responsibility for the Toronto shooting, but did not provide any evidence to support the claim.

 

"At this stage, we have no evidence to support these claims," said Toronto police Chief Mark Saunders at a press conference.

 

"We will continue to explore every investigative avenue including interviewing those who knew Mr. Hussain, reviewing his online activity, and looking into his experiences with mental health," he added.

 

Meanwhile, Toronto Mayor John Tory cautioned against drawing any conclusions from information circulating on social media.

 

"I would just like to stress that people should rely on the information that is going to be forthcoming over time, including today, from the Toronto Police Service about this," he told reporters.

 

The gun used by Hussain has been traced to the United States and U.S. authorities are helping narrow down its origin, according to CBC Wednesday.

 

A source said that Hussain attended high school at Toronto's Marc Garneau Collegiate Institute and Victoria Park Collegiate Institute and was apprehended twice by police while he was under age 18, according to CBC.

 

A police source said investigators recovered a firearm and a computer from Hussain's apartment in the Thorncliffe Park neighborhood where he lived with his mother, father and brother. His neighbors and friends described him as quiet but mild-mannered and always polite.

 

Hussain did not have a criminal record and his prior contact with police did not involve a risk to public safety, according to Toronto police spokesman Meaghan Gray.