Three people were displaced Sunday after a fire at the Rivera Apartments on Maple Valley Highway.

According to Renton Fir Department Deputy Chief Eric Wallgren, the initial call came in as a fire and the department dispatched four engines a ladder truck and an aid car, among others, to the site. Upon arrival, the site was upgraded to a “working incident,” which brought additional chiefs, units and the chaplains to the incident.

“We had plenty of resources there,” Wallgren said Monday.

According to Wallgren, the fire originated in an apartment unit and migrated to the exterior of the building, catching a vehicle on fire as well.

Several people saw the fire and attempted to fight it with fire extinguishers before the fire department arrived, but it got “too hot and grew way too fast,” according to Otto Bauer, who was on the scene.

One woman was transported to Valley Medical Center for non-life threatening injuries and was treated for smoke inhalation.

Wallgren said the fire appears to be accidental and electrical in nature, but an investigation is under way. Three adults were displaced due to the fire and all were aided by the Red Cross.

The estimated damage to the building is about $100,000.