DARIEN, Ga. -

McIntosh County cancelled classes at its four public schools Thursday morning as a precaution after someone posted a threat on social media.

Sheriff Steve Jessup told WSAV-TV that the scare was prompted by a "credible threat," including a photo of a gun and a written statement that was circulated on social media.

At an afternoon press conference, Jessup said no physical evidence had been found, “but we are questioning students.”

Diane Richardson, deputy school superintendent for McIntosh County, says no one was injured. She says parents were allowed to pick up their children early Thursday, but schools remained open so students who ride the bus wouldn't be home alone while their parents were at work.

Parents told WSAV "it has been a chaotic scene" as they rushed to remove their children from the schools. Parents say they were searched, and some vehicles were searched as well.

Authorities announced no arrests connected to the threat. School officials say classes will resume Friday.

“We will have school tomorrow," Superintendent Tina Kirby said late Thursday. "No doubt everything is safe and everything will run just as smoothly as it always has.”