Summerville Elementary School was deemed safe Thursday morning and students were allowed back inside after an evacuation because of a bomb threat, authorities said.

The Summerville Police Department and other emergency crews searched the school at 835 S. Main St., said Pat Raynor, spokeswoman for Dorchester County School District 2. Raynor said the telephone message that relayed the threat was delivered as a recording.

It was then reported at 8:30 a.m. to district officials, who called for the evacuation. All students and staff members safely got out of the building, Raynor said.

Nothing was found during the search, and the evacuation order was lifted a short time later, police Capt. Jon Rogers said.

Investigators were still working to track down the source of the threat, he said.

Reach Andrew Knapp at 937-5414 or twitter.com/offlede.