As a result of the mortar explosion at the Rivne military range, four servicemen of the 15th separate mountain-infantry battalion have been killed, which is a part of the 128th separate mountain-infantry brigade and is based in Uzhgorod, four more fighters have been injured, Zakarpattia Regional State Administration has reported.

"Two soldiers died on the spot, another two on the way to the hospital, four others were wounded. Two of the dead are residents of Uzhgorod, another one is a citizen of Perechyn," it said.