Four people riding in a speedboat registered in the U.S. were killed Feb. 25 in a gunfight with Cuban government forces after entering the country’s waters, according to the Cuban Embassy in the U.S.

Crewmembers aboard a speedboat registered in Florida entered Cuban waters and opened fire on Cuban Ministry of the Interior forces when they approached the American vessel, the Cuban Embassy said in a statement. Aboard the Florida-registered vessel, four were killed and six were injured in the gunfight; the commander of the Ministry of the Interior vessel was wounded in the gunfight, Cuba said.

“In the face of current challenges, Cuba reaffirms its determination to protect its territorial waters, based on the principle that national defense is a fundamental pillar of the Cuban State in safeguarding its sovereignty and ensuring stability in the region,” Cuban authorities said. “Investigations by the competent authorities continue in order to fully clarify the events.”

According to Cuban officials, the wounded crewmembers of the Florida-registered boat were evacuated for medical assistance.