An Alabama military complex was put on lockdown Tuesday following reports of an active shooter, but authorities lifted the lockdown in all but one building and said they do not believe there is an ongoing threat.
Officials are still investigating the incident, and it is unclear why the lockdown was initiated, according to the Associated Press.
The Redstone Arsenal base's Facebook page posted an update that only one building at the base is locked down, but beforehand it issued a standard "run, hide, fight" warning about a possible shooter.
Possible active shooter on the Arsenal. Installation is locked down. Run hide fight.
— Redstone Arsenal (@TeamRedstone) June 27, 2017
Officials had said that an active shooter drill was planned for this week, but they have not said if this incident is connected. Redstone Arsenal spokesman Christopher Colster said that he was not sure what to say.
"I really can't say at this point what happened," he said. "I'm not sure myself."
Facility spokeswoman Kim Hanson told CNN that authorities are "still working on confirming the situation."
No arrests or injuries have been reported at the base.
This story is still developing and will be updated as more information becomes available.
