STOCKTON, Calif. (AP) — Stockton police are looking for the shooter responsible for killing two people and wounding three others.

Stockton Police department spokesman Joe Silva said a gunman fired into an outside birthday party of about 20 people, including children, Sunday night before fleeing in a light-colored vehicle.

Police initially suspected 20-year-old Sergio Hernandez was the gunman. But Silva said Hernandez turned himself in to police Thursday and was released after an interview. Silva said Hernandez is no longer a suspect.

Police say Juan “Junior” Sarrarez and his girlfriend Reyna Perez were both killed in the shooting. The deaths were Stockton’s fourth and fifth homicides of the year.

Copyright 2013 The Associated Press.