A woman and a child from southern Ontario are dead and a boy is injured after a single all-terrain vehicle crash east of Parry Sound, Ont.

Ontario Provincial Police say the crash took place just before 7 p.m. Sunday in Perry Township.

They say three people from Holland Landing, north of Toronto, were riding on the ATV

Police say a 42-year-old woman was pronounced dead at the scene.

They say a five-year-old girl was in serious condition when she was airlifted to hospital, where she later died, and a nine-year-old boy sustained non-life-threatening injuries in the crash.

Police say the investigation is ongoing.