The fire at the Masjid Al-Salaam Mosque began late Saturday night.
"The building suffered heavy smoke damage inside, with little damage evident outside," reported the Peterborough Examiner. "Damage is estimated at $80,000, fire officials said."
The president of the mosque, Kenzu Abdellah, told The Canadian Press that people were in the building celebrating the birth of a child just 30 minutes before someone set the fire.
"The Muslim community has a very good relationship with the Peterborough community,'' he said.