The dead were not immediately identified, and it was not known if they were related to each other.
The circumstances that led to the shooting remain unclear, and there was no indication of a motive.
At least one of the victims was found dead in the street in front of a house.
Authorities suggested there could have been more than one shooter.
“At this time I cannot say whether there was one or multiple shooters,” Haddow said, according to KIRO.
A witness who lives nearby told the News Tribune that he heard gunshots then saw a man running before jumping into a waiting car.
Another resident told police she heard as many as seven shots being fired before she and her kids hit the deck, the News Tribune reported.
Investigators cordoned off the street, and a SWAT team was called to the area for backup.