Ohio’s Wright-Patterson Air Force Base went into lockdown for several hours while security officials investigated reports of a shooter on the campus.
Officials from the 88th Airbase Wing eventually gave the all-clear around 1:40 a.m. Friday morning and say there is no threat and no one injured.
A spokesman says two individuals reported hearing one gunshot Thursday night. The report launched a series of events leading to the lockdown.
Responders conducted two sweeps of the National Air and Space Intelligence Center. That's a large, three-story facility at the base that is the Department of Defense’s primary source for foreign air and space threat analysis.
Officials are investigating what caused the sound.