At least 11 people are sick after someone opened what's being called a "suspicious letter" at a military base in Virginia.
It happened at Joint Base Fort Myer-Henderson Hall in Arlington. An official told CNN three service members had a burning sensation on their hands and face. One person's nose was bleeding. Three people went to the hospital.
It's not clear what might have been in the letter or who handled it. Field tests of the letter came back negative for any harmful substance, according to a law enforcement official. But the FBI was set to examine it Tuesday night.
Law enforcement said the text of the letter was "derogatory" and "ranting." It was addressed to a commanding officer at the base. It's not clear if the sender had any connection to the base.
Additional reporting from Newsy affiliate CNN.
