Douglas County High School was placed on lockdown for more than an hour Wednesday after school officials received an anonymous phone threat, police said.

Police did not release the nature of the telephone call, which was received about 11:45 a.m., Douglasville police spokesman Maj. J.R. Davidson said.

“Our detectives are still working on identifying where the call came from,” he said.

Police searched the campus and determined there was no threat. The lockdown was lifted about 1 p.m and the school resumed normal operations for the rest of the day, authorities said.

Soon after, Cedartown High School in Polk County was placed on a “Code Blue lockdown,” school officials wrote in a Facebook post.

Authorities said they were made aware of a potential threat through an anonymous tip line, the post said.

No students were allowed to leave the building while authorities investigated the threat.

That lockdown was lifted about an hour later after authorities determined there was no threat to students or staff.

In other news: 

A 16-year-old girl has been arrested after police said she planned to kill people at a predominantly black church in Hall County.