Morgan Fitzgerald Middle School in Largo was evacuated for the second time in eight days due to a bomb threat Friday.
The evacuation was lifted after an extensive search of the school was conducted. No devices were found.
The bomb threat was found written on a bathroom door.
The students were sent to Pinellas Park High School while police conducted their investigation.
The Pinellas County Sheriff's Office assisted in the investigation.
The school was evacuated on Feb. 23 after a bomb threat was found on a bathroom wall. The school was searched but nothing suspicious was found.
Meanwhile, in Tampa, Van Buren Middle School was on lockdown for about an hour. A student was arrested for having a BB gun on campus.
The school was placed on lockdown while police interviewed students.