What to know about the boat shooting in Cuban waters that killed 4

Investigations are underway after Cuba said a speedboat carrying 10 people approached the island's north shore and opened fire on Cuban soldiers when confronted. The Cuban Interior Ministry said the troops returned fire, killing four people and wounding six others who were been detained Wednesday after the encounter. Cuba’s government said the people aboard the boat were Cubans living in the U.S. and accused them of trying to infiltrate the Caribbean island to unleash terrorism. U.S. Secretary of State Marco Rubio said it was not a U.S. government operation. The U.S. government said it is launching its own investigation to determine the facts.