PLEASANT HILL -- A man inappropriately touched a 17-year-old girl as she walked to school in Pleasant Hill on Monday, officials said.

The girl was on her way to Prospect High continuation school at about 7:40 a.m. when the man sneaked up from behind, touched her and ran off, according to police and district officials.

She was on a popular walking trail between W. Hookston Road and Astrid Drive, about one mile from the continuation school, which shares a campus with Pleasant Hill Middle School.

The suspect is described as a 30-year-old white man, about 5-feet 6-inches tall, with a thin build and short sandy-colored hair, officials said. He was wearing a white T-shirt, tan jacket, sunglasses and a backpack. No similar incidents have been reported in the area, said police Sgt. Scott Vermillion.

Mt. Diablo Unified School District Superintendent Nellie Meyer said principals at the site sent out a phone message to families about the incident and went into classrooms to talk to students. They reminded students to pay attention to what is going on around them while walking to and from school, instead of using cell phones, Meyer said.

"We want to make sure our students are attuned to their surroundings," she said.

Meyer said school security workers were in contact with Pleasant Hill police throughout the day.

Contact David DeBolt at 510-262-2728. Contact Theresa Harrington at 925-945-4764 Follow them at Twitter.com/daviddebolt and Twitter.com/tunedtotheresa.