A Wednesday morning phone call claiming there was a bomb near or at Building 10 of the Naval Support Activity Base in Bethesda, Maryland, which also houses the Walter Reed National Military Medical Center, has been partially cleared.

As of 1:18 p.m. EDT, local authorities eased lockdown procedures at the complex, allowing traffic to once again move out of the facility, a tweet from NSA read, and lifted a shelter in place order from each individual building as K-9 units cleared them. 

An active shooter at the base was also investigated, but officials could not find any evidence that was the case. The lockdown, however, remains because of the bomb threat. ABC 7 News reports that all gates are closed except for emergency traffic.

Walter Reed patients and staff were alerted to the lockdown via a message over the loudspeakers, which was later shared on Twitter. 

 “Naval Support Activity Bethesda remains in a base-wide lockdown, shelter in place. All hospital staff, our patients, and our visitors are permitted to resume movement, within the immediate workspace or area only. You are not permitted to leave the floor or leave the building at this time," the message states.

The message also stated that "emergency movement is permitted within the hospital. All staff are to be aware that multiple security forces are currently conducting sweeps within our hospital with K-9 units.”

Walter Reed also advised patients that all appointments were canceled at the hospital until further notice. 

This news come a day after a brief bomb threat closed down First Street and Constitution Avenue NW and First Street and Louisiana NW, near the Department of Labor, according to the Washington Examiner.