Man Drives Truck Onto National Mall Claiming Anthrax Possession

iStock/Thinkstock(WASHINGTON) -- A man drove his vehicle onto the National Mall in Washington D.C. Tuesday, claiming he had anthrax in his vehicle, law enforcement sources tell ABC News.

Initial field tests for the substance were negative. Authorities are interviewing the man and clearing the scene of any other potential hazards.

This is a developing story. Please check back for updates.

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