According to a briefing, an explosive device became loose and "rolled" out of its designated area.
The device did not explode, but there are concerns that it could. Out of an abundance of caution, personnel was evacuated from the airbase while airmen on the base attempt to contain and secure the explosive.
Video shared by residents living near the base shows streets cordoned off by police.
Officials are asking residence in the areas around the base to remain in their homes.
Base officials believe the situation is under control.
The type of explosive and cause for it becoming loose have not been detailed by authorities.