Honolulu Fire Department investigators determined that a Waikiki hotel fire Thursday was caused by a stove being left on.

HFD Capt. Scot Seguirant said a fire sprinkler system extinguished the fire within minutes after it started at 1:31 p.m. at the 26-story Ilikai Hotel & Luxury Suites at 1777 Ala Moana Blvd.

The first of six units arrived at 1:35 p.m. and found no signs of smoke or fire from the exterior of the building, but discovered the sprinkler system had activated in unit 2338 and extinguished the kitchen fire by 1:39 p.m., Seguirant said.

Two adults and a child were not in the unit at the time of the fire and no one was hurt.

HFD investigators say the fire was accidental. Damage estimates were not available.

Honolulu police closed two makai-bound lanes on Ala Moana Boulevard, between Hobron and Kahanamoku streets, for about two hours because of the fire.