PLACENTIA (CBSLA.com) — Authorities seek a woman and her nephew last seen Wednesday morning driving on the 57 Freeway.

Jennifer Ledezma, 20, and 2-year-old Adrian Rocko Ledezma Spence were last seen about 11 a.m. Wednesday in a red Chevrolet Cobalt on the southbound 57 Freeway between the 60 Freeway and the Chapman Avenue exit in Fullerton, Placentia police said.

Authorities said foul play is not suspected in their disappearance.

Ledezma is Hispanic, 5-foot-2, 128 pounds with brown hair and brown eyes. She was last seen wearing a burgundy, long-sleeved shirt and blue jeans.

The boy is also Hispanic, 2-foot-5, 34 pounds with blond hair and blue eyes. He was last seen wearing a green T-shirt and blue jeans.

Anyone with information on their whereabouts is asked to call Placentia police at (714) 993-8146.