Transfers of soldiers are said to have already begun, according to Nis, reports the news agency Yonhap. The authority publishes satellite images that are said to show how a first group of 1,500 soldiers is sent to Vladivostok. The soldiers are to be trained in Russia and then sent to the front, according to Nis.
NATO's Secretary-General Mark Rutte says he cannot yet confirm the reports, but condemns North Korea's actions regardless.
They are helping to fuel Russia's war in every way they can, says Rutte at his press conference after NATO's defense minister meeting in Brussels.
South Korea's president is said to have called an emergency meeting on Friday, following the reports of the transfer.
Russia launched its full-scale invasion war against its neighboring country in February 2022. The relationship between the communist dictatorship North Korea and Moscow has become even warmer after the outbreak of war, and there are reports that dictator Kim Jong-Un has long been assisting Russia with weapons.