Tinker Air Force Base in Midwest City was evacuated Friday morning in an area near Gott Gate, located on Air Depot and SE 59th St., due to a security concern.

Police and fire crews were called out to the scene around 11:30 a.m.

Officials tell News 9 a delivery truck was flagged for the possibility of an explosive residue. The Oklahoma County Sheriff's Office Bomb Squad investigated and determined the truck was not a threat. The truck and driver were turned around without incident and the delivery was denied, Tinker AFB officials said in a press release.

Operations at the base have since returned to normal and personnel are back to work.