Two bomb threats were made Wednesday morning to Meridian High School.
The first claimed a device had been placed in the gym. After it was checked and found to be bogus, another call was made indicating a bomb was in the classroom building.
Both threats were pranks.
School safety director Dr. Sam Thompson says an investigation has developed some leads in the case.
Students who have information about suspects may call 484-4906 to report it and could be eligible for up to a $1,000 reward.