According to Los Banos police, just after midnight, officers were sent to a home east of Los Banos Junior High School on Edward Street, where they found a woman with a gunshot wound.
Officers tried to give medical aid to the woman, but she died at the scene. Her identity has not yet been released.
37-year-old Joseph Sawnson was taken into custody for homicide.
The gun used in the shooting was found.
Investigators say that the incident was a result of domestic violence.
If you are the victim of domestic abuse, or you know someone who is, there is help available 24/7. In Fresno County, call the Marjaree Mason Center at (559) 233-4357. In all other locations, call the National Domestic Violence Hotline at (800) 799-7233.