Eleven people are sick and three in hospital after a suspicious letter was sent to a military base just outside Washington DC.
The sick came down with nosebleeds and burning hands after the letter was opened at Joint Base Myer–Henderson Hall in Arlington, Virginia.
A hazardous materials team has been dispatched as the Arlington Fire Department confirmed the three people, at least two of them US Marines, in hospital are in stable condition. Several of the sick, many Marines among them, are being treated on base.
The building has been evacuated and according to tweets from the US Marine Corps, the letter contained an "unknown substance".
"Base officials are coordinating with local [hazardous materials] teams and the FBI," they wrote.
An envelope containing an unknown substance was received, today, Base officials are coordinating with local HAZMAT teams and @FBI. Several
aboard Joint Base Myer-Henderson Hall. Personnel in the affected building took immediate preventative measures by evacuating the building.
Marines are receiving medical care as a result of this incident. No additional details are available at this time as the investigation is ongoing.