Cuban officials said a U.S. registered speedboat violated their territorial waters, kicking off an armed confrontation with Cuban border guard troops in which four people on the vessel were killed.

Cuba’s Ministry of the Interior posted the statement on Facebook.

U.S. officials did not immediately respond to requests for comment.

A commander of the Cuban border guard was injured and six people on the U.S. registered vessel were also injured, the statement said.

The statement noted that the people on the U.S. registered vessel had initiated the firefight.

“When a surface unit of the Border Guard Troops of the Ministry of the Interior, carrying five service members, approached the vessel for identification, the crew of the violating speedboat opened fire on the Cuban personnel, resulting in the injury of the commander of the Cuban vessel,” the statement said.