A man has been arrested on suspicion of murder after his three-week-old baby girl was found dead near their Southern California home.

Los Angeles County Sheriff's officials say the infant had been reported missing by the father and mother on Friday night.

After a search, the baby's body was found Saturday morning in the front cab of a pickup truck parked in a Santa Clarita apartment complex.

Deputies arrested 30-year-old Matthew Warner on suspicion of murder.

Det. Holly Francisco said Warner led officers to an area where he believed the child may be.

Francisco says the child's distraught mother is cooperating with investigators.

The child was found about a half-mile from Warner's Newhall-area home.

The coroner's office will try to determine the cause of death.