Honolulu firefighters responded to an apartment fire at a 12-story condominum building in McCully early Sunday morning.

Firefighters arrived at 739 Hausten St. at about 4:30 a.m. and found heavy smoke and fire coming from the 9th floor of the condominium.

Three occupants — a woman and two men — were reported to be sleeping in unit 902 at the time of the fire. One man, awakened by the light, heat and smoke, alerted the other two, and all three were able to safely escape, Honolulu firefighters said.

The men used a fire hose cabinet’s line to suppress the flames and were able to control the fire by the time firefighters arrived. Firefighters fully extinguished the blaze about half an hour later. Both men were treated for smoke inhalation and transferred to Emergency Medical Services paramedics.

The damage, confined to the living room, is estimated at $140,000 to the unit and $30,000 to its contents. The origin and cause of the fire are under investigation. No other injuries were reported.

Honolulu Fire Department officials remind residents that a working smoke alarm can increase your chances of survival from a fire by more than 50 percent.