Two men pulled from a burning house Friday on North Fifth Avenue in Yakima remained in critical condition Saturday afternoon, the Yakima Fire Department said.

Yakima fire Capt. Jennifer Norton said the two, who along with at least two others were occupying an abandoned two-story home, remain at Harborview Medical Center in Seattle. Fire officials have said they do not intend to release the names of the two victims.

The cause of the fire at 402 N. Fifth Ave. remains under investigation. Norton said investigators have taken samples from the scene to a crime lab for further analysis. The department expects to receive the results in a few days.

“They’re not leaning toward a suspicious cause at this time,” Norton said.

Fire Battalion Chief Tom Sevigny said Friday that investigators had detained one woman pulled from the fire, along with a man caught leaving the scene of the fire for questioning. If either of the hospitalized men die, the matter could become a homicide investigation, he said.

Authorities said smoke from the fire was first reported shortly after 10 a.m. by a police detective driving through the neighborhood, located just north of the Safeway store on Fifth Avenue.

Firefighters brought the fire under control after cutting into the roof and breaking a window as smoke and flames poured from the structure.