Ukrainian drones struck four Su-34 fighter jets at the Marinovka airfield in Russia's Volgograd Oblast overnight on June 27, Ukraine's General Staff said.
The operation was carried out by the Special Forces and the Security Service of Ukraine (SBU) in cooperation with other military units, according to the General Staff.
Volgograd Oblast is located some 900 kilometers (560 miles) southeast of Moscow.
According to preliminary data, two Russian fighter jets were destroyed, and the other two were damaged. Russia uses such aircraft to bomb Ukraine, particularly to drop guided aerial bombs, the General Staff said.
The attack also caused a fire in the airfield's technical and operational unit, a facility where combat aircraft are serviced and repaired, according to the General Staff.
The Kyiv Independent could not independently verify these claims.
As Russia intensifies aerial attacks on Ukraine and the civilian death toll climbs, Ukraine has stepped up its drone attacks on Russian territory. The recent surge in drone strikes aims to disrupt airport operations, overwhelm air defenses, and mount pressure against the Russian population.
