They were killed when a group of far right nationalists got ambushed by the Ukrainian Army while trying to get out of the Semenivka village, Censor.NET reports with reference to Novyy Region.
Residents of St. Petersburg Matvey Efremov and Vladimir Melnikov came to Ukraine on July 1 in a group of twelve Russian far right activists. They came with a party of military equipment in the amount of 1.32 million rubles (almost $40,000): boots, uniforms, binoculars and one crossbow. The operation was led by member of the National Democratic Party Aleksander Zhuchkovskiy.
On July 2 the Russian guests and two DPR militants were detected by the ATO forces while moving from Sloviansk to Semenivka in a minibus. As a result of a well-organized ambush and fire from mortars and tank, the separatists' vehicle was destroyed and Efremov and Melnikov were killed. According to one version, they burned in the minivan, and to the other they were killed during the retreat.