This is announced by the SBU press service, Censor.NET informs.
As reported, two Ukrainian citizens voluntarily joined ranks of the terrorists and participated in combat activities against Ukrainian units since last year.
According to one of the detained persons, there were representatives of the Russian FSB service in their ranks. The arrested terrorists also mentioned trips to Russia's Rostov region to receive weapons.
Upon detainment, a light machine gun and a tommy-gun were seized from the mercenaries. Investigation is underway.