Six officers from North Korea were among the 20 soldiers killed in a Ukrainian missile strike on Russian-occupied territory near Donetsk, intelligence sources say.
From: Kyiv Post by Kateryna Zakharchenko

More than 20 soldiers were killed as a result of an Oct. 3 missile strike on Russian-occupied territory near Donetsk, including six officers from North Korea, who came to confer with their Russian counterparts, Kyiv Post’s intelligence sources said. Three more North Korean servicemen were wounded.
According to reports from Russian social media, prior to the missile strike, the Russians were demonstrating to North Korean representatives the training of personnel for assault actions and defense.
Last year, Ukraine’s Main Intelligence Directorate (HUR) reported the arrival of a limited contingent of servicemen from North Korea to the temporarily occupied territory of Ukraine, including units of engineering troops, indicating active cooperation between Russia and North Korea.