SEATTLE — Police are searching for at least one suspect in the fatal shooting of four people in an East Tacoma neighborhood on Thursday afternoon. Two female victims and one male victim were shot dead on Everett Street, Tacoma police spokesperson Wendy Haddow said. A second male victim with life-threatening injuries was taken to a hospital, where he died, Haddow said. The identities and ages of the dead were not immediately known, but all four victims appear to be adults, Haddow said. Investigators are unsure whether the shooter acted alone, Haddow said. As of Friday, no suspect had been arres…