The King County Medical Examiner has identified the 26-year-old man and 4-year-old boy who died July 19 in a two-alarm fire at an Auburn four-plexin the 2300 block of O Street Northeast.

According to the King County Medical Examiner, Nicholas Weisenbach, 26, and Omen Weisenbach, 4, both died of “asphyxia due to smoke inhalation.”

The VRFA estimates the four-plex sustained $350,000 in damage.

As of Monday morning, investigators were still trying to determine the cause of the fire.

Just after 11:30 p.m. July 19, Valley Com dispatched VRFA firefighters to a reported fire at the four-plex.

With neighbors reporting that people may have been trapped inside one of the units, Auburn Police officers tried to enter the unit before the arrival of fire crews, but smoke and heat forced them back.

Arriving firefighters quickly knocked down the flames and got in, where they found father and son dead on the second floor. Two other occupants of that unit made it out safely, the VRFA reported,

The American Red Cross is helping all of the other occupants find housing. A dog survived the fire.

The unit where the fatalities occurred and an adjoining unit sustained heavy fire damage, the remaining two units sustained smoke and water damage. There is damage to the attic space in all four units.

The Puget Sound Fire Authority, South King Fire & Rescue, King County Medic One and Rehab One from Skyway Fire King County District 20 helped the VFRA.