Iran will completely shut the strategic Strait of Hormuz if U.S. President Trump executes threats to target Iranian energy facilities, the country's Revolutionary Guards said in a statement on Sunday.

Trump on Saturday threatened to "obliterate" Iran's power plants if Tehran did not fully reopen the Strait of Hormuz within 48-hours, suggesting a significant escalation barely a day after he talked about "winding down" the war, now in its fourth week.

In their Sunday statement Iran's Revolutionary Guards also said companies with U.S. shares will be 'completely destroyed', if Iranian energy facilities were targeted by Washington and energy facilities in countries that host U.S. bases will be 'lawful' targets.