An elderly woman is in the hospital after an overnight fire in Montreal's Notre-Dame-de-Grâce neighbourhood.

The fire broke out shortly before 3 a.m. on a second floor apartment in a seven-storey building on Benny Crescent.

Firefighters found the 80-year-old woman inside the apartment, unconscious, sitting in her rocking chair. 

Firefighters said they believe the woman fell asleep while smoking.

She is being treated for second and third-degree burns on about per cent of her body, including her hands, arms and face.

A neighbouring building was partly evacuated. 

No one else was injured.