A man walked on to the Patterson High School campus and exposed himself, then grabbed a female student at her locker before she was able to break free, according to the Stanislaus County Sheriff's Department.
The suspect fled before deputies arrived on the scene minutes later, according to Capt. Tim David. The incident occurred Wednesday at 6:52 a.m.
The suspect was described as a clean-shaven Latino male in his 30s, 5 feet, 6 inches tall, 180 pounds and wearing a blue sweatshirt and gray sweat bottoms.
He apparently walked up to the girl and accosted her before she began yelling and screaming and broke free. She ran to the attendance office to report the incident.
Patterson Police Services provided extra patrol for the school this morning, and will do so this afternoon and throughout the week, David said.
"We're very concerned about this and are putting resources to work in an attempt to identify and capture the suspect," he said. "We're working closely with the school."
Anyone with information or potential witnesses are asked to call Det. Michael Fisher at 892-5071.