The explosion came a month after the driver of a van plowed into pedestrians on a Toronto sidewalk, killing 10 people and injuring 14.
Fifteen people were injured after an improvised explosives devices were detonated inside a restaurant in Mississauga, a Canadian city close Toronto.
Three of the 15 injured had critical injuries, the local paramedic service said in a Tweet. They then fled, police believe, in a vehicle, Evans said.
The explosion caused "a considerable amount of damage", Evans said, adding there were two private parties at the Indian restaurant at the time, with children under 10 in attendance.
External Affairs Minister Sushma Swaraj on Friday said that she was touch with Indian diplomats at the high commission in Ottawa and the consulate general in Toronto. An additional 12 people ranging in age from 23 to 69 suffered minor injuries.
The conditions of the three victims - a 35-year-old man, a 62-year-old woman and a 48-year-old woman - have since been upgraded to stable.
The first is described as 5ft 10ins to 6ft tall, of stocky build, in his mid-20s with light skin and was wearing dark blue jeans, a dark zip-up hoodie pulled over his head, a baseball cap underneath with a light grey peak and had his face covered with black material.
The image released by police shows both men with dark hoodies pulled over their heads and their faces covered.
Bonnie Crombie, Mississauga's mayor, said she was thankful there were no fatalities.
"We need the public's assistance to help identify these men", Evans told reporters. The other is described as 5'9"-5'10", fair skinned with a thin build, wearing faded blue jeans, a dark zip-up hoodie, grey T-shirt and dark-coloured skate shoes.
A bomb went off at an Indian restaurant in Mississauga, and authorities say it's not terror related? No one has claimed responsibility, and the motive for the attack was not known.
Police sealed off the shopping plaza where the explosion took place.
Bertram said they could not say what the device was yet but said it was filled with "projectable objects". Derek Patterson, the son-in-law of the restaurant's owners, said his family is still in disbelief. "We know this is an extremely hard time for them", said Chief Jennifer Evans at a news conference the morning after the attack.
"You don't know who you can trust nowadays", she said. Please call Peel police criminal investigation bureau at 905-453-2121 ext 1233 or leave a tip at Crime Stoppers 1-800-222-TIPS.