A suspicious package at Joint Base Anacostia-Bolling in D.C. prompted a lockdown on Thursday afternoon but was later determined not to be a threat.

The Secret Service alerted Anacostia-Bolling to a suspicious package in its building on the base just after 11 a.m. Authorities then evacuated all buildings within a 1,000-foot cordon and notified the few buildings on the perimeter to shelter in place.

Joint Base Andrews said it sent in its explosive ordinance disposal team, which determined the package was not a threat, and by around 3:15 p.m., the base was given the all-clear to reopen.

Anacostia-Bolling went into lockdown in August after a man made his way onto the base. The man was caught about two and a half hours after a “potential armed individual” was reported.

“This is the second time in the last few weeks that our response teams have been put to the test for a significant event, and I’m proud of the way they responded to ensure the safety of the installation and all who live and work here,” said Col. Erica Rabe in a news release.

The base in Southeast D.C. houses Air Force, Marine Corps and Coast Guard units, along with the Washington field office of the Naval Criminal Investigative Service and the headquarters of the Defense Intelligence Agency.