Iran's Revolutionary Guards' Navy have seized two vessels smuggling 4.5 million litres of fuel, the semi-official Tasnim news agency reported on Wednesday.
Tasnim said 34 foreign crew have been detained by the Guards in the operation.
Iran, which has some of the world's cheapest fuel prices due to heavy subsidies and the plunge in the value of its national currency, has been fighting rampant fuel smuggling by land to neighbouring countries and by sea to Gulf Arab states.
