DAYTON, Ohio — Air Force authorities are trying to find out what prompted a 911 call that caused a chaotic “active shooter” reaction on a sprawling Ohio base.

Spokeswoman Marie Vanover at Wright-Patterson Air Force Base near Dayton said Friday the investigation “is ongoing,” and that there’s no timetable yet for its completion. She said no injuries have been reported from the Thursday incident.

Active shooter incident at Wright-Patterson was false alarm Wright Patterson Air Force Base is reportedly dealing with an active shooter situation, according to locals and statements released by base public affairs officials.

During an extensive search after the call to base security, a security team member shot a locked door during a room-by-room sweep of the base hospital as people on the base, home to 27,000 military and civilian personnel, were locked down.

Authorities said the 911 call came during training that included an active shooter scenario in another base area at least a half-mile away, but a link wasn’t clear. The reports of an active shooter sent dozens of security forces and other emergency responders to the Air Force base.