A shooting at a home left five people dead Sunday in what authorities said could be a murder-suicide.

Police officers responding to a shots-fired call at about 5:20 p.m. found two men and two women shot dead at a house on a cul-de-sac, Riverside County sheriff's Sgt. Dennis Gutierrez said. A fifth victim, a woman, was taken to a local hospital where she later died.

Two of the victims were found inside the house, the other three on a patio outside, Gutierrez said.

Gutierrez said neighbors told investigators that all five people lived at the house. None of the victims have been identified.

Gutierrez said investigators believed one of the victims was also the shooter.

The shooting brought temporary chaos to the usually quiet street next to a golf course in a neighborhood full of retired people.

"I don't think we've had anything like this happen in this city," Gutierrez said.

"I was in the kitchen cooking. I heard bam. I thought it was a golf ball," neighbor Maureen Fowler, 54, told the Riverside Press-Enterprise. "Then I heard, bam bam bam. That sounded like gunshots to me. Then I heard all the sirens and saw the tape."

Temecula is about 80 miles north of San Diego.