Saudi Aramco, the world's top oil exporter, has cut crude supply to Asian buyers for a second month in April, two sources with knowledge of the matter said on Monday, after the U.S.-Israeli war with Iran disrupted trade via the Strait of Hormuz. The producer is supplying only Arab Light crude exported from the Red Sea port of Yanbu to term customers in April, the sources said, keeping supplies to Asian refineries tight and capping their refined products output.