Crews stood by outside while firefighters inside the building searched for the cause of the alarm.
Capt. Raymond Brinkley, who was at the wheel of one of two trucks at the center, said crews inside were investigating the alarm. "So far everything looks good," he said about 6:10 p.m.
Levar Jones said he was the last civilian inside the building when firefighters arrived. "At least I think I was; it's like a maze in there," he said. Jones, who works for Progressive Communications in Milledgeville, Ga., said he was installing the Voice Over Internet Protocol system, which allows phone service over the Internet. He said he was not aware of any fire or other problem inside the building.
"They're going through closets, everything," Jones said of the firefighters.
Firefighters were still at the scene at 6:30.
Government offices from the city of Thomson and McDuffie County have begun moving into the structure. The district attorney's office moved to the Railroad Street structure last week