A 12-year-old has been implicated in a bomb threat that forced an evacuation Wednesday morning at Chestatee Academy of Inquiry and Talent Development.

Hall County Sheriff’s Office spokesman Deputy John Marshall said in a Friday news release that investigators expect to arrest a 12-year-old, seventh-grade boy in early next week.

The charge is expected to be disruption of a public school, Marshall said. Due to the age of the child, no names or other details are being released.

A second threat made on Thursday also disrupted school activities. In both incidents, the threat was written on the bathroom wall, and searches of the building and grounds turned up no evidence of a device.

There is no suspect in the second threat, and Marshall said the two incidents are still under investigation by the Criminal Investigations Division.

A $1,000 reward was offered by the school system for information leading to an arrest and conviction.

Hall County Schools spokesman Gordon Higgins said the Sheriff’s Office pledged “cooperation in prosecuting to the full extent of the law.” It was not immediately clear what that may include. The minimum age in Georgia to be found guilty of a criminal offense is 13.