The Defense Department said a Marine who had been assigned to the Pentagon tested positive for COVID-19 on March 24 and has been placed in isolation at his home to undergo further assessment by health professionals.
The Marine, whose last day at the Pentagon was March 13, is the first known case of COVID-19 at the Pentagon.
"The Marine followed U.S. Centers for Disease Control guidelines and DOD directives by isolating himself when an immediate family member began to show symptoms," DOD said. "Once he became ill, he contacted his assigned medical facility. His workspace has been cleaned by a Pentagon response team and a thorough contact investigation is underway to mitigate risk and preserve the health of the workforce at the Pentagon."
The Pentagon is one of the largest office buildings in the world, but has become increasingly locked down amid the coronavirus outbreak.
DOD has reported 600 positive COVID-19 cases worldwide and one death -- a defense contractor who worked in the Crystal City neighborhood of Arlington, VA, supporting the Defense Security Cooperation Agency.