A Chinese mercenary has shared details about North Korean soldiers allegedly killed shortly after they joined Russia’s war effort in Ukraine.

The information was shared on X (formerly Twitter) by the account @whyyoutouzhele on Sunday, in a conversation between a gun-for-hire fighting alongside Russian forces, who goes by the handle “Dian Yuzhang,” and a mercenary who has returned to China and goes by the name Li Dafu.

These claims emerged just days after South Korea’s National Intelligence Service confirmed that North Korean troops had been training in Russia before being sent to bolster Russia’s diminished forces and help contain Ukraine’s counteroffensive in Russia’s Kursk region.