NEW : Shooting in Federal Way , Washington , began with domestic dispute , police say . The man then went to the parking lot of the apartment complex and fatally shot two men . Police : Gunman killed four people before being fatally shot by police . Police : Ties between police , families of the victims are unclear , police chief says . Shots were still being fired when officers arrived , police spokeswoman says .
NEW : Shooting in Federal Way , Washington , began with domestic dispute , police say . Police : Gunman killed four people before being fatally shot by police . Police : Ties between police , families of the victims are unclear , police chief says . Shots were still being fired when officers arrived , police spokeswoman says .