The country’s export and import prices both increased for the third consecutive month in September on the back of rising global oil prices. 

According to data released by the Bank of Korea on Tuesday, the country's import price index marked 139-point-67 in September, up two-point-nine percent from a month earlier to climb for the third straight month.

The export price index also gained one-point-seven percent from August to stand at 119-point-56 last month.

Compared to the same period last year, the export price index dropped eight-point-nine percent while the import price index slipped nine-point-six percent. 

A rise in global oil prices drove the increase in the two price indexes, with the price of Dubai Crude, South Korea's benchmark, climbing seven-point-nine percent from 86 U.S. dollars and 46 cents per barrel in August to 93 dollars and 25 cents per barrel in September.