Iran's Revolutionary Guard seized two container ships in the Strait of Hormuz on April 22, just hours after Trump extended the U.S.-Iran ceasefire indefinitely. The seizures came after Trump extended the ceasefire to allow Iran's leaders time to submit a unified proposal to end the war. The core issue: Iran's parliament speaker says the U.S. naval blockade violates the ceasefire and that reopening the strait is impossible under this blockade, while the Trump administration argues it's not a ceasefire violation because these were international vessels, not U.S. or Israeli ships.