"In order to kill some commanders of illegal armed formations uncontrolled by the command of the Russian occupation troops 150-strong group comprising special operations teams of the Russia GRU of the General Staff of the Armed Forces and the FSB have arrived in Donetsk city," a statement said. Also, facts of the arrival of troops, military equipment and ammunition for the needs of Army Corps of separatists 1 and 2 from Russia have been confirmed.