A grandfather and teenage grandson died inside a burning home in Kent early Friday, fire investigators said.
The men, who firefighters have not identified yet, were 69-years-old and 19-years-old.
Two women, who also live in the house, survived the fire and were able to get out safely.
A neighbor, Matt Irving, said he was awake at 4:00 a.m. when the fire broke out on the 3900 block of South 238th Street. He said he ran to the home and could hear people inside.
"I heard [someone] going from one bedroom to the other, almost like he was looking for somebody else," said Irving.
Irving, shaken up by the ordeal, said he tried to save the victims by breaking out a window, but was unable to rescue them.
"It just really sucks when you hear guys alive inside and you hear something obviously moving in there and its not a little kitty cat or a puppy dog, it's a human being," he said.
It's not yet known what started the fire.
Firefighters said when they arrived on scene, the single-story home was already engulfed in flames.
Two firefighters from South King Fire and Rescue suffered minor injuries while fighting the fire. One of the firefighters was treated at a hospital and released.