A Calgary man is in hospital in critical, life-threatening condition after a fire early Sunday morning in the southeast community of Dover.

Police, fire crews and EMS responded to the 3500 block of 33rd Street S.E. shortly after 1 a.m. following a 911 hangup call. Crews found smoke billowing from a home.

"We received care from the fire department of a man in his early 70s who we then transported to the Peter Lougheed Hospital in critical, life-threatening condition," said Stuart Brideaux, EMS spokesperson.

Firefighters were able to put of the blaze and the cause is still under investigation.