BOSTON (AP) — Federal prosecutors in Boston say two men face drug charges after the Coast Guard allegedly found them transporting about $20 million in cocaine on a sailboat in international waters about 400 nautical miles east of the U.S.

The U.S. Attorney’s office said 27-year-old Hicham Ramzi Nahra of Canada, and 49-year-old Benjamin Celma-Sedo of Spain, were charged in a criminal complaint Friday with possession of cocaine with intent to distribute. Prosecutors say the men had about 621 kilograms on the boat Callisto, bound for Montreal. It’s not immediately known if the men have attorneys.

The Coast Guard Cutter Dependable found the 49-foot boat, carrying the name Elegrance and flying a Candian flag, on Monday. Canadian authorities discovered wasn’t a Canadian vessel. Prosecutors say it was identified as Callisto, whose last port of call was Venezuela.