Not good! 10 canisters containing ‘chemical warfare’ like substance found off Long Island, NY coast

Who put it there? What is it? Is this an isolated case?

Clam Boat Pulls Up Canisters Off NY, Crew Sick

One Canister Broke Open and Released Unidentified Chemicals That Caused Two Crew Members to Blister

(AP) A fishing boat dredging for clams off New York's Long Island pulled up 10 canisters, including one that broke open and released an unidentified chemical that caused two crew members to blister and struggle to breathe, the U.S. Coast Guard said Monday.