An envelope containing an “unknown substance” was opened at a US base near Washington on Tuesday, leaving 11 people sick, including military personnel, the Marine Corps said. The envelope, which was received at Joint Base Myer-Henderson Hall around 3:30pm (2030 GMT), led to an evacuation of the building, the US Marine Corps said in a statement. “Joint Base Police Department officials are working with local HAZMAT teams, NCIS (Naval Criminal Investigation Service) and the FBI. Marine spokesman Major Brian Block said it was too soon to say whether the incident was being considered a terror attack. Joint Base Myer-Henderson Hall overlooks Arlington Cemetery just across the Potomac River from Washington.

Source: Hindustan Times February 28, 2018 03:11 UTC