MYRTLE BEACH, S.C. (AP) - Authorities say Myrtle Beach High School was evacuated for about four hours after a threat was found written on a bathroom wall.
Investigators say officers and bomb-sniffing dogs found nothing dangerous.
Horry County schools said the threat was discovered around 9:45 a.m. Monday. Students stayed at a nearby middle school until 1:30 p.m., when they were cleared to go back inside.
Officials wouldn't detail what was in the threat.
Horry County schools have dealt with a number of bomb threats recently, including five in 15 days at one school last December.
Copyright 2012 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.