EL PASO, Texas (AP) — The man accused of carrying out last weekend's deadly mass shooting at a Walmart in the Texas border city of El Paso confessed to officers while he was surrendering and later explained that he had been targeting Mexicans, authorities say.

Patrick Crusius, 21, emerged with his hands up from a vehicle that was stopped at an intersection shortly after last Saturday's attack and told officers, "I'm the shooter," Detective Adrian Garcia said in an arrest warrant affidavit.

Crusius later waived his Miranda rights and agreed to speak with detectives, telling them he entered the...