Early Monday morning, Fort Lee in Virginia went on lockdown as a single shot was heard from inside the Combined Arms Support Command Headquarters.

Fort Lee, an Army base about 130 miles south of Washington DC, went on lockdown at about 9 a.m. but after 50 minutes, the “all clear” was given.

Upon investigation from first responders inside the base, a female soldier turned a gun on herself, fired the single shot, and injured only herself.  According to a post from the Fort Lee Facebook page, “Special Agents from the U.S. Army Criminal Investigation Command are on scene and investigating the incident.”

One official, according to FOX News, described the shooter as “disgruntled,” however, the identity of the shooter has yet to be released.

This shooting comes only four months following the most recent shooting at Fort Hood, and new protocols for active shooters were announced only days ago at Fort Lee in response to the Fort Hood shooting.  According to ABC News, it is unclear at this time whether or not these new protocols were used in this event.

As of right now, Army officials are investigating the shooting, while the shooter has been transported to the Virginia Commonwealth University Medical Center.  Her condition is unknown as of now.

Army officials are expected to give a statement on the shooting later in the day.