Fifteen people have been wounded after a bomb was set off in a restaurant in the Canadian city of Mississauga, local police said.

The blast went off in the Bombay Bhel restaurant at about 10.30pm local time.

Three of the 15 injured had critical injuries, the local paramedic service said in a Tweet.

Two male suspects fled after detonating their improvised explosive device, police said in a Tweet. No one has claimed responsibility, and the motive for the attack was not known.

Police posted a photograph on Twitter showing two people with dark zip-up hoodies walking into the restaurant. One appeared to be carrying an object.

Roads in the area were closed and a large police presence was at the scene, with heavily armed tactical officers arriving as part of the large emergency response, local media reported.

The attack in Mississauga comes a month after a driver plowed his rental van into a lunch-hour crowd in Toronto, killing 10 people and injuring 15.

Mississauga is Canada's sixth-largest city, with a population of 700,000 people, situated on Lake Ontario about 20miles (32 km) west of Toronto.