Sri Lanka, May 4 -- Kuwaiti crude oil exports tumbled from more than one million barrels a day to zero in April, according to Iranian media, marking the "first such disruption" since the end of the Gulf War in 1991.

The Gulf nation pumped oil throughout the month, but authorities moved some of the production to storage and allocated a portion to refined products, the Iranian Students' News Agency (ISNA) reported Monday, citing data shared by the oil tracking platform TankerTracker.

Shipments of refined fuels "continued in limited volumes even as crude oil shipments dropped to zero," ISNA said, highlighting a "sharp break from its usual export flow of more than one million barrels per day."

Just on Sunday, several regional nations inclu...