Valdiva is driving a white 1992 four-door Toyota Camry, with California license plate 5GBD911. He is described as Hispanic, 5 feet 8 inches tall, with brown hair and brown eyes.
Yosseline has brown hair and brown eyes, and was last seen wearing a white long sleeve T-shirt and beige sweat pants.
Anyone with information is asked to call the Alameda County Sheriff's Department at (510) 667-7721.
Freeway signs in Los Angeles County were activated just before 6 a.m. The Alameda County Sheriff's Department is handling the child abduction, with the assistance of the CHP.
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