Cuban forces killed four people and wounded six others aboard a Florida-based speedboat that entered Cuban waters on Wednesday and opened fire on a Cuban patrol, the Cuban government said at a time of heightened tensions with the United States.The wounded were evacuated and receiving medical attention, while the Cuban patrol commander was also wounded, Cuba’s Interior Ministry said in a statement, adding that the matter was under investigation to clarify exactly what happened.For all the latest headlines, follow our Google News channel online or via the app.Florida Attorney General James Uthmeier said he was ordering prosecutors to open a separate investigation in conjunction with other state and federal law enforcement partners, saying the Cuban account could not be trusted.The highly unusual incident took place as the United States has blocked virtually all oil shipments to the island, increasing pressure on the Communist-run government. American forces captured Venezuelan President