Another bomb threat was called in Thursday at Central High School in Brooksville. 

• Central High School, Endeavor Academy bomb threat today
• 4th threat against school in last three days
• Law enforcement conducting full sweep of campus

It was the fifth threat in four days at the school. 

Thursday's threat also included neighboring Endeavor Academy.

Central and Endeavor were placed on lock down as law enforcement was called in and authorities and school administrators conducted a full sweep of the campuses. 

Hernando County schools said all of the students were safe and sheltering in place. 

Two threats occurred on Wednesday with others happening earlier this week. 

The sheriff's office said they are working diligently to ensure the safety of all students, teachers, and staff at the school.