DAYTON, Ohio -- An Air Force base in Ohio says there was "no real world active shooter incident" hours after authorities responded to reports of a shooter.
Wright-Patterson Air Force Base says via Twitter that base personnel remain safe.
The base said the report occurred during a "normal, scheduled installation exercise" that included an active shooter scenario.
Security forces and other emergency responders had rushed Thursday to the hospital at Wright-Patterson near Dayton.
Wright-Patterson had sent a tweet saying it was responding to a "reported Active Shooter incident."
About two hours later, video from outside of the hospital showed service members and others standing outside the building. Some had come out with their hands in the air.
Workers at Wright-Patterson were told to shelter in place on the sprawling base.
Video from outside of the hospital showed service members and others standing outside the building about two hours after the base said emergency workers responded to reports of active shooter. WHIO-TV reported that an announcement was made telling some people to leave the building with their hands on their heads.
The Bureau of Alcohol, Tobacco, Firearms and Explosives said via Twitter it was among several agencies.
Earlier, Wright-Patterson sent a tweet saying it was responding to "a reported incident."
Stacey Geiger, with the base's public affairs office, said the base was on lockdown but she had no other information to release.
Local police were directing traffic away from the base, which is Ohio's largest single-site employer with more than 27,000 civilian employees and military personnel.
The Ohio State Highway Patrol and local police also had officers at the base.
The base was the site where the Dayton Peace Accords were finalized in 1995, an international peace agreement that ended the war in Bosnia.