Police said the second building of the office and community complex was cleared as a precaution. Authorities did not disclose the nature of the threat, and the investigation remained ongoing as of Friday evening.

The King and Queen, a pair of 18-story towers that rise above the Perimeter Center skyline near the interchange of Interstate 285 and Georgia 400, are among the most recognizable landmarks in Sandy Springs. The complex houses a mix of offices, retail and community space and sits at the heart of one of the region's busiest commercial corridors.

Details about what prompted the evacuation, how many people were affected and whether any suspects have been identified were not immediately available. Police did not say whether the buildings had been cleared for reoccupation.

Evacuations of large office towers in the Perimeter area can ripple through the surrounding community, disrupting commutes and raising anxiety for thousands of workers who pass through the district each day. The King and Queen complex in particular draws heavy foot traffic from nearby businesses, hotels and residences.

This is a developing story. Anyone with information about the incident is urged to contact the Sandy Springs Police Department.