ARLINGTON, VA (24/7 News Source) -- The FBI is investigating who sent a letter with an unknown substance to Joint Base Myer-Henderson Hall in Arlington that left eleven sick and three hospitalized. Officials say people reported feeling ill after coming in contact with the letter around 3:30 Tuesday afternoon.
Three people were taken to the hospital and are reported to be in stable condition. The building was evacuated and the area where the incident happened was screened and cleared. The FBI is testing the substance.
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