SAN PABLO -- The double killing of the mother and father of a 4-year-old girl has left the child without parents and police scrambling for leads to solve the crime.

The child was in the apartment and not injured.

Edgar Campano and Blanca Arguetta, both 30, were shot to death at their apartment complex early Sunday and police are asking for the public's help in solving the rare double killing in San Pablo, Lt. Jeff Palmieri said.

Police were called to the 1800 block of Powell Street at 12:45 a.m. Sunday after neighbors reported hearing gunshots. The couple was found shot multiple times at the top of an outside stairwell near their apartment.

The child has been placed in protective custody, Palmieri said.

No arrests had been made as of Monday evening.

Anyone with information regarding this case should call the San Pablo Police investigations division at 510-215-3150 or the West Contra Costa Crime Stoppers tip line at 510-799-8255.

Reach Kristin J. Bender at kbender@bayareanewsgroup.com. Follow her at Twitter.com/kjbender.