Honolulu firefighters rescued a 51-year-old man from a house fire in Waipahu Sunday night.

Ten units with 35 firefighters responded to the blaze at the home located at 94-348 Haaa St. near Honowai Elementary School at about 11:20 p.m. When they arrived they observed smoke and flames emanating from the front of the residence, according to Honolulu Fire Spokesman Capt. Scot Seguirant.

Investigators said the fire was intentionally set.

Firefighters located an unresponsive man in the bathroom. Seguirant said they rescued him and began CPR.

The 51-year-old man regained consciousness.

Emergency Medical Services personnel treated him and took him to a hospital in serious condition.

Firefighters brought the fire under control just before 11:40 p.m. and extinguished it shortly after midnight.

Seguirant said the home did not have working smoke detectors.