In a recent report, the National Assembly Budget Office predicted that the cost of local industrial output would rise 0.57 percent if the price of crude oil gains 10 percent.

The cost of petrochemical and overland transportation output would rise 7.44 percent and 1.11 percent, respectively, if the price of crude oil gains 10 percent, the report said.

International oil prices have been surging since US President Donald Trump declared Washington's withdrawal from the Iran nuclear accord Tuesday, defying its European allies.

The spike in crude prices is seen as reflecting concerns that the US resumption of sanctions on Iran could reduce its oil exports, resulting in a global supply bottleneck.

According to the Bank of Korea, South Korea's producer prices rose slightly in April on increasing crude prices.

The producer price index, a barometer of future consumer inflation, reached 104.13 in April, up 0.1 percent from a month earlier, or 1.6 percent on-year. South Korea imports all of its oil.