Following a threat warning some not to attend Heard County High School Thursday, the Federal Bureau of Investigation early Friday continued its search for a person of interest in the case, according to Channel 2 Action News.

Students also headed back to school Friday after many skipped on Thursday, Channel 2 said.

Usually about 650 students attend the high school campus, according to Channel 2. But attendance was down to 100 students Thursday after someone posted this message on social media: “Some of you guys are alright - don’t go to HCHS in Franklin, Ga on 11:28 a.m. tomorrow.”

The post led the Heard County School System to increase police presence at all five of its schools Thursday, the district's associate superintendent said.

Franklin police Chief Kevin Hannah told Channel 2 he doubted the threat’s legitimacy but wanted to put decision-making power “in the parent’s hands where it belongs.

“If we felt this was a direct and legitimate threat, we would have canceled school today,” Hannah said.

Father Scotty Lee told Channel 2 even though the recent threat wasn’t the first the school received, he wasn’t worried.

“You know with the FBI being involved in it, I wasn’t too concerned about it,” Lee said.

The Heard district is in Franklin, about 58 miles southwest of Atlanta.