Toronto: Canadian police are hunting for two unidentified men who walked into a restaurant in the city of Mississauga and set off a bomb, wounding more than a dozen people, and then fleeing, authorities said.

The blast went off in the Bombay Bhel restaurant at around 10.30pm local time. Fifteen people were taken to hospital, three of them with critical injuries, the Peel Regional Paramedic Service said in a Tweet.

The two male suspects went into the restaurant and detonated their improvised explosive device, Peel Regional Police said in a Tweet. The men then fled.

There was no immediate claim of responsibility.

Police posted a photograph on Twitter showing two people with dark zip-up hoodies walking into an establishment with one of them appearing to be carrying an object.

The attack Canada's sixth largest city, 32 kilometres west of Toronto, comes a month after a driver plowed his white Ryder rental van into a lunch-hour crowd in Toronto, killing 10 people and injuring 15.

Reuters