Toronto police said that, in all, a 10-year-old girl and an 18-year-old woman died and 13 people were injured in a crime scene that stretched almost 400 yards.
The statement says the Sunday evening attack in Toronto's Greektown neighborhood had been carried out in response to Islamic State's call on its followers to target citizens of countries participating in a USA -led alliance fighting the radical militia.
Files being reviewed by police include concern Hussain expressed "support" for a website that was seen as "pro-ISIL", says a law enforcement source. So the investigations are likely to be pursued at various angles to find the exact situation as said by the Canadian Police Chief.
"At this stage, based on the state of the investigation, which is led by the Toronto police service, there is no connection between that individual and national security", Goodale said.
ISIS had claimed credit for the Sunday night attack which killed an 18-year-old woman and a 10-year-old girl.
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.
Hussain's family issued a statement saying their son had a long history of psychosis and depression and had not responded to numerous treatment approaches, including therapy and medication. The community has to come to the realization that we are NOT the victims and that we have evil in our midst which we must weed out. "We will mourn those who were lost for the rest of our lives", Hussain's family said in a statement.
Hussain, who was 29, was born in Canada, according to people who knew the family. Gun ownership also requires training, a personal risk assessment, two references, spousal notification and criminal record checks.More news: North Korea reportedly dismantling key missile launch site
The Toronto City Council has voted overwhelmingly to urge Canada's federal and provincial government to ban the sale of handguns and handgun ammunition in the largest city in the country.
"I've said for some time that the city has a gun problem, in that guns are far too readily available to far too many people", Toronto's mayor, Tory, said on Monday. It passed on a 41-4 vote.
Logi Vidarsson, who has been living in Toronto for over 10 years, said that a tragedy like this should never happen.
For his part, Sukhera said he's struggling to reconcile the memory of the smiling, polite, quiet young man he mentored with the image of a gunman, clad in black garb, shooting through windows at people enjoying a warm summer evening. "I understand the argument of hunters and fishers, but no one is using handguns to cull the raccoon population in Toronto", he said.
She said it's important that the community comes together because residents of Greek town need support and positivity.
Fallon, who recently graduated from a nearby high school, was preparing to study nursing at McMaster University starting in the fall.
He died after an exchange of gunfire with police but it remains unclear whether he took his own life or was killed by police.
"I'm out of my mind just thinking about it".