Honolulu police have opened a first-degree arson investigation involving an early morning fire at a home in Mililani Mauka today.

The fire occurred just before 2:55 a.m. at the single-family residence on Lahui Street.

Police said an unknown suspect threw at least one Molotov cocktail-type device at a window on the side of the house.

Several occupants managed to extinguish the fire before firefighters arrived. No injuries were reported. Police said there was minor damage to the structure.

Police indicated some of the occupants were uncooperative with responding officers.

There are no arrests at this time.