NSA Bethesda Update: At this time, there is no indication of an active shooter on the installation. A bomb threat is still under investigation. A lockdown remains in place.
Naval Support Activity Bethesda reports that Walter Read Medical Center in Bethesda is currently on lockdown due to a bomb threat / active shooter investigation. All personnel are being told to shelter in place. Walter Reed is advising all personnel to stay clear from the medical center.
More information when it becomes available. Follow the Walter Reed Twitter account here for up to the minute updates.

2/2 – 0925, 20OCT21: The base is on lockdown. All personnel should shelter in place. All gates are closed to non-emergency traffic. The public is asked to avoid the area.
— Naval Support Activity Bethesda (@nsabethesda) October 20, 2021