UPDATE: All Clear at Andrews Air Force Base
UPDATE: According to law enforcement officials: all clear at Joint Base Andrews.
JOINT BASE ANDREWS, Md. (AP) — The Latest on reports of an active shooter at Joint Base Andrews outside Washington (all times local):
10 a.m.
Homeland Security Secretary Jeh Johnson says there is an "unfolding situation" at Joint Base Andrews in Maryland but is providing no further details.
The base, which is home to Air Force One, tweeted Thursday that the base is on lockdown due to a report of an active shooter.
The tweet instructs all personnel at the base in Washington's Maryland suburbs to shelter in place and says more information will be released as it comes.
Johnson is testifying before the Senate Judiciary Committee. He says he may have to take a break from the hearing as the situation at Andrews develops.
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9:55 a.m.
An employee at a medical facility at Joint Base Andrews outside Washington says an active-shooter drill had been planned, but officials later told workers it was a "real-world" situation.
Rodney Smith is a patient advocate at the military post's medical facility. He said Thursday that he was on lockdown and didn't have any more information.
Smith said by phone: "First it was an active-shooter exercise. Then it came back 'real world.'"
Smith said the situation was unfolding at the newer of two buildings at the Malcolm Grow Medical Facility on the base. He was in the older building.
Joint Base Andrews said in a tweet that the incident is ongoing and that first responders are on scene.
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9:50 a.m.
Joint Base Andrews tweets that the base is on lockdown due to a report of an active shooter.
The tweet sent Thursday morning instructs all personnel at the base in Washington's Maryland suburbs to shelter in place and says more information will be released as it comes.
A second tweet from the base says the incident is ongoing at the Malcolm Grow Medical Facility and first responders are on the scene. It instructs everyone to continue to shelter in place, a precaution meant to keep people safe while remaining indoors.