South Korean authorities have reportedly captured a second ship suspected of transporting oil to North Korea following a new round of United Nations (U.N.) sanctions aimed at weakening the country's economy.

The ship can carry 5,100 metric tons of oil, according to South Korea's Yonhap News Agency, which added that the crew hails mostly from China and Myanmar.

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South Korea is carrying out an investigation, according to the news agency.

South Korea revealed last week that in November it captured a Hong Kong-flagged ship that was thought to have transported 600 tons of oil to the Sam Jong 2, a North Korean tanker.

President Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE accused China of illegally selling oil to North Korea last week after South Korean newspaper Chosun Ilbo reported that Chinese and North Korean ships were meeting at sea to transfer the oil.

Caught RED HANDED - very disappointed that China is allowing oil to go into North Korea. There will never be a friendly solution to the North Korea problem if this continues to happen! — Donald J. Trump (@realDonaldTrump) December 28, 2017

China has denied making any oil sales to North Korea that violate U.N. sanctions.