The Russian ship Partizan, which has been blacklisted by the U.S., docked in Busan port in September, data from the Busan maritime police revealed Monday confirmed.

The Partizan, owned by Russian shipping company Gudzon, entered Busan port and stayed for about four hours for refueling on Sept. 12 even though the U.S. blacklisted it in August for illegally supplying oil to North Korea through ship-to-ship transfers in violation of UN Security Council sanctions.

A Busan port official said, "At the time, a major oil company provided the ship with engine and generator fuel at market rates. I believe the government failed to inform us that the Partizan had been blacklisted."

The oil company that refueled the Partizan could face U.S. sanctions if it knew that it was a blacklisted ship.

The Sevastopol, another ship owned by Gudzon, also sought to refuel in Busan, but Korean oil companies refused, leaving it marooned for more than a month, according to Radio Free Asia on Tuesday. Gudzon's vice president told RFA that GS Caltex and Hyundai Oilbank refused to provide fuel and added that he "understands" their fear of being sanctioned by Washington.

When the ship arrived in Busan in late September, the government investigated possible sanctions violations but did not find any wrongdoing and allowed it to leave early last month.

