An armed social studies teacher holed up in a classroom and fired off a round inside a Georgia high school on Wednesday, police said.

Cops, responding to reports of gunshots at Dalton High School, arrested Jesse Randal Davidson, 53, who was alone when officers arrived, Dalton Police said.

“Evidently it was not aimed at anybody,” said police spokesman Bruce Frazier, who could not immediately provide a motive for the incident.

The area was evacuated and the rest of the school placed on lockdown. Students were taken to the Northwest Georgia Trade Center.

Snapchat video shows students running through the school toward the exit.

“Everybody running and crying. He in the building bruh,” the footage, posted on Twitter by user @wesleycaceres5, was captioned.

“Never did I think this would happen at my school,” said 19-year-old Merrill Walker.

“I started getting messages from friends still in the school making sure each other were okay,” the high school senior told The Post. “Opening those made my heart drop.”

Some students started tweeting about gun control reform in light of President Trump’s response to the Parkland, Fla., Valentine’s Day school shooting.

“Please don’t tell me a damn thing about arming teachers,” wrote user @idkhillary. “Please don’t tell me that I don’t know what the hell I’m talking about.”

“My favorite teacher at Dalton high school just blockaded his door and proceeded to shoot,” wrote @_omg_chondi_omg in a tweet aimed at the National Rifle Association. “We had to run out the back of the school in the rain. Students were being trampled and screaming. I dare you to tell us arming teachers will make us safe.”

Davidson has been a teacher at the high school since 2004 after starting his career as a local radio journalist.

He served as the play-by-play voice for Dalton football games and published a book on the team’s history in 2013, according to the Dalton Public Schools blog.

Three students were taken into custody last week after making threats to high schools in the area, including Dalton High School, the Times Free Press reported.