The gunfire broke out nearby Jimi Hendrix Park at the town's Central District, based on Q13 FOX of Seattle.
Police received a call about gunshots about 9:15 p.m. and reacting officers discovered more shots when they came in the region, Assistant Chief Deanna Nollette informed the channel.
Both injured people were considered to have been taken by the defendant, The Seattle Times reported. Police consider the gunman and the victims could have understood each other, the report stated .
Neither the defendant nor the injured people were instantly identified.