Several media outlets with inside sources to the investigation say Hussain visited ISIS websites and expressed support and may have previously lived in Afghanistan and Pakistan. So the investigations are likely to be pursued at various angles to find the exact situation as said by the Canadian Police Chief.
Police investigate a auto at the scene of a shooting in Toronto.
Reportedly, an 18-year-old woman and a 10-year-old girl were dead after hard treatments while around 10 people were injured severely with gun wounds undergoing treatment.
A senior police source, while cautioning that this doesn't mean Hussain wasn't mentally ill, said that often with such people, there are frequent encounters with police - calls from the family for help, suicide attempts or committals to hospital under the Mental Health Act. They said medications and therapy had been unable to treat him.
Reacting to the "terrible tragedy" in the early hours of Monday, Prime Minister Justin Trudeau tweeted: "The people of Toronto are strong, resilient and courageous - and we'll be there to support you through this hard time".
Mourners could be seen carrying signs that read #DanforthStrong and other messages of resilience, showing the world that this vicious attack on The Danforth won't define who we are as a city.
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To own a gun in Canada, an individual must apply for a licence, pass a background check and pass a firearm safety test. Guns must be kept locked and unloaded and can only be legally carried outside the home with a special permit.
According to a post-shooting story by CBS News, Canada tightened its gun laws after a 1989 mass shooting at a college campus that left 14 dead. It is now illegal to possess an unregistered handgun or any kind of rapid-fire weapon. "Canada also requires training, a personal risk assessment, two references, spousal notification and criminal record checks". Toronto's city council has voted in favor of a number of gun control initiatives, including hiring more cops and installing new security cameras with gunshot-detecting microphones, the outlet said. It passed on a 41-4 vote. While some friends said he was "not at all radical", others said he was more interested in Islamic discussions "when there were more people around".
The girl from Markham, Ont., was killed when gunfire erupted Sunday in the Toronto's Greektown, police said, adding that her family has requested privacy during "their time of grief".
Danforth Avenue was filled with hundreds of people Wednesday night to honour the victims of Sunday's mass shooting.
Local politician Nathaniel Erskine-Smith confirmed the 18-year-old victim was Reese Fallon, a recent high school graduate who planned to study nursing. "I've just thought about being more vigilant with keeping an eye on my surroundings".
He said, "I think he wanted to impress those guys". It remains unclear what, if any, affiliation the 29-year-old shooter, Faisal Hussain, may have had with the group.