Earlsboro Public Schools closed all sites and canceled classes for Thursday, Nov. 14 after receiving a threat Wednesday, Nov. 13, the district said.

According to Superintendent Mark Maloy, a bomb threat was found written on the wall of the school Nov. 13 prompting the district to cancel classes the next day.

Maloy said Earlsboro police and the Pottawatomie County Sheriff's Office searched the schools and insured they were clear of any bombs or real threat.

"We're always going to be on the safe side," Maloy said.

Police found no true threat and deemed it safe to resume classes Friday, Nov. 15 Maloy said.

The superintendent explained the district is working with local police and the sheriff's office on an ongoing investigation to determine who wrote the threat.

Check back for updates.