Chief Evans said her police force is working with others in the region as well as provincial and federal law enforcement in the investigation.
An explosion caused by an "improvised explosive device" ripped through an Indian restaurant in a mall in the Toronto suburb of Mississauga, wounding 15 people, Canadian police said.
Police say the two suspects fled the scene immediately after the incident.
The Peel Regional Paramedic Service tweeted that three people suffered "critical blast injuries".
While three of those injured - a 35-year-old Brampton man, a 48-year-old Mississauga woman, and a 62-year-old Mississauga woman - were originally listed in critical condition, Evans said their condition has since been upgraded to stable. The other 12 received minor or superficial wounds, officials said. "This is not the Mississauga I know", she said.
Mayor Bonnie Crombie was also on hand for the press conference and described the incident as heinous.
Children under 10 years old were inside as well but they were not hurt. "The people who have done this need to answer for their crimes and they need to be brought to justice".
The Plaza area around the restaurant has been sealed, The Express quoted the police as saying.
Police say two separate private birthday parties were being held in the restaurant when the blast went off.
Sanjiv Jagota, who owns a nearby store, was driving by the area last night when he saw a number of emergency vehicles. Investigators continue to search for clues near the Bombay Bhel on Friday.
"The suspects detonated an Improvised Explosive Device (IED) inside the restaurant before taking off", Const. Iryna Yashnyk said. "This place is like their baby".
In a message posted to the restaurant's Facebook page on Friday morning, the operators of the Bombay Bhel called the bombing "extremely horrific" and "sad".
Bertram said they couldn't say what the device was yet. "This is very sad".
The police, looking for public's assistance in identifying the suspects that fled following the explosion, released their description.
India's Foreign Minister Sushma Swaraj said in a tweet that the she was in constant touch with the Consul General in Toronto and the Indian High Commissioner in Canada and that the missions would work round the clock.
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