The Walter Reed National Military Medical Center in Maryland is on lockdown Wednesday morning as officials investigate a bomb threat and an active shooter threat.

Officials say security personnel responded after they received an anonymous call at 8:45 a.m. stating there was a bomb at or near a building in the Naval Support Activity Bethesda, which houses the hospital. Officials did not specify details about the active shooter threat.

The base went into lockdown, and all personnel were ordered to shelter in place. All gates to the facility are closed to non-emergency traffic and officials asked the public to avoid the area.