The California Highway Patrol has issued an Amber Alert for four children missing out of Montebello.
The children were taken Saturday by their biological father, according to the CHP.
The alert was issued after a woman's body was found in the trunk of a car that belonged to the boys' parents. The body's identity has not been released.
The children, Jordan Dante Perez, 11, Jaden Eric Perez, 9, Tristin Devin Perez, 8, and Alex Hayden Perez, 6, are described by the CHP as Hispanic juveniles.
Officers said their father, Daniel Diego Perez, 43, was last seen driving a black 2014 Toyota Camry with license plate number 7FDS891.
Daniel Perez is described as a Hispanic male with black hair and brown eyes, 5 feet 10 inches tall, and weighing 140 pounds.
Anyone with information on the children's or Daniel Perez's whereabouts is asked to call the Montebello Police Department at (323) 887-1313.