Update: Regional HazMat Team is making entry to ID substance @ArlingtonVaFD @AlexandriaVAFD #BREAKING pic.twitter.com/KaexXtx1tS
— IAFF LOCAL F253 (@FortMyerFire) February 27, 2018
A number of people became sick — and three were taken to the hospital — after a letter was opened at a military base in Virginia.
A total of 11 people fell ill at Joint Base Myer-Henderson Hall in Fort Myer on Tuesday after an unknown substance was found in an envelope, according to ABC News.
The building was evacuated and three people, including two Marines, were transported to a hospital.
The base is next to Arlington National Cemetery and close to the Pentagon.
It was unclear if the unknown substance was harmful.