FAIRFIELD (CBS 5) — Police are calling Saturday afternoon’s shooting in Fairfield a murder-suicide after the gunman killed a man and woman and injured a second man before shooting himself.

KCBS’ Mark Seelig Reports:

The relationships and motivation for the shooting on the 5200 block of Venus Drive are still unclear, Fairfield police Officer Cleo Mayoral said. Police expect to release a more detailed timeline of events at the shooting, which appears to have started as a domestic dispute.

The fourth victim and 911 caller from the scene was treated and released Saturday from a local hospital after he suffered a gunshot wound to the ankle, Mayoral said.

The Solano County coroner’s office has not released the names of the victims, Mayoral said.

(© 2011 CBS Broadcasting Inc. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)