2 intruders passed a security checkpoint at Joint Base Andrews. One was apprehended with a weapon, but the other remains at large.

• Joint Base Andrews in Maryland went into lockdown Sunday after a vehicle drove through security.
• One intruder was apprehended with a weapon, though no shots were fired. The other is still at large.

Two people improperly passed through a security checkpoint at Joint Base Andrews in Maryland on Sunday, prompting a lockdown at the main gate.

At around 9 p.m., the driver of a vehicle ignored commands from security personnel at the main gate and drove through, according to a press release provided to Insider. After they deployed barriers and stopped the vehicle, two people got out and tried to flee on foot.

One of them was apprehended by security forces. That person had a weapon but no shots were fired, the release said.

On Monday, authorities identified the apprehended person as a 17-year-old male, Joint Base Andrews said in a statement posted to Facebook. He remains in custody.

The second person is still at large.

An investigation is ongoing, and Joint Base Andrews said on Monday that there's "confirmatory evidence that the base intruder on the loose had departed the installation."

Authorities told local outlet WTOP News that there was no active shooter.

As of 3 a.m., Joint Base Andrews has resumed operating at full capacity, the Facebook statement said.

"We appreciate everyone's understanding and patience as the installation was being searched," said Col. Tyler Schaff, 316th Wing and Joint Base Andrews installation commander, in a press release. "The safety of our personnel is always our top priority, and your cooperation helped make it possible for our Defenders and partners to thoroughly and swiftly search the base."

Joint Base Andrews is where Air Force One, the aircraft for the president, is deployed.

Vice President Kamala Harris and other cabinet members had just landed at the base at the time of the lockdown, according to Scott Detrow, an NPR White House correspondent who was on the base. A White House official told Detrow that Harris and the others made it safely off the base.

The cabinet members were Transportation Secretary Pete Buttigieg, Education Secretary Miguel Cardona, Housing and Urban Development Secretary Marcia Fudge, and EPA administrator Michael Regan.

The White House did not immediately respond to Insider's request for comment.