BUCKEYE, Ariz. (AP) — Authorities are searching for a 15-year-old girl who disappeared from her Buckeye home on Christmas Eve. Police say Leah Costa's mother reported that she ran away with her 17-year-old boyfriend. Authorities say they found him Saturday night walking along Interstate 10 west of Buckeye. They say he was disoriented and his clothing was torn but he couldn't recall what happened to Costa. She was last seen wearing a plaid shirt, a black tank top, jeans and black shoes. Authorities are asking anyone with information to contact the Buckeye Police Department at 623-349-6400.