Cuba's Foreign Minister Bruno Rodríguez accused the United States of fabricating a pretext to overthrow Havana's government.
U.S. Secretary of State Marco Rubio claimed Cuba threatens security by hosting Chinese and Russian forces within 90 miles of U.S. shores.
President Donald Trump escalated an energy blockade in January, limiting oil supplies after detaining Venezuela's Nicolás Maduro and halting Venezuelan fuel shipments.
Since the blockade, only one Russian tanker has delivered crude oil to Cuba, highlighting the island's growing energy isolation.