June 22 (UPI) -- The U.S. military killed two men in its latest strike targeting a suspected drug-trafficking boat in the Caribbean, U.S. Southern Command announced late Sunday, lifting the monthslong operation's death toll to at least 213.

The strike left six survivors, according to SOUTHCOM, which said in a statement that it immediately notified the U.S. Coast Guard to activate search-and-rescue operations.

The condition of the survivors was not known. UPI has contacted the Coast Guard for an update.

There have been 66 known U.S. strikes targeting boats suspected of being in the process of transporting drugs through international waters of the Pacific and Caribbean, resulting in a handful of survivors, though it was unclear how many were rescued.

As with previous strikes, SOUTHCOM alleged, without providing any proof, that the boat targeted was "operated by a designated terrorist organization."