Eleven people reported feeling ill and three were taken to a hospital Tuesday after an envelope containing an unidentified substance was opened at Joint Base Myer-Henderson Hall in suburban Washington, D.C., officials said.
The fire department in Arlington, Virginia, where the facility is located, said the three hospitalized victims were stable but that their conditions weren’t immediately available.
A gunnery sergeant opened the envelope at about 4 p.m. ET and showed it to a superior, a Marine official told NBC News. People who were exposed reported symptoms including itchy hands and faces and bloody noses, the official said. The building was evacuated immediately, a Defense Department official said.
The Marine Corps said local haz-mat teams, Arlington fire crews and the FBI were on the scene.
No further information was immediately available.
This is a developing story. Refresh this page for updates.