Havana has said the crew of an American-flagged vessel attacked a coast guard patrol

US Secretary of State Marco Rubio has denied any American government involvement in a deadly gunfight between Cuban border guards and a US-flagged speedboat, describing the incident as “very unusual.”

Cuban authorities announced on Wednesday that border guard forces had killed four armed men aboard a US-flagged speedboat that allegedly opened fire during an identification check in the island’s territorial waters near Villa Clara province.

The vessel did not belong to either the US Navy or the US Coast Guard, Rubio told reporters during a diplomatic visit to…

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