As fears grow over Russia’s “larger operations” in Ukraine’s eastern region, Moscow’s forces claimed to have making more damage to Kyiv’s military weapons.

Russian defense ministry spokesperson Major General Igo Konashenkov said that Russia destroyed four S-300 anti-aircraft missile systems given to Ukraine by an unidentified European nation. The missile systems were hit by Russia’s Kalibr missiles.

The incident took place on the outskirts of Dnipro in Ukraine where the S-300 launchers were hidden. They were also able to  hit 25 Ukrainian soldiers. However, these claims cannot be independently confirmed.

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“High-precision sea-launched Kalibr missiles destroyed the equipment of a S-300 anti-aircraft missile division which had been delivered to the Kyiv regime by a European country,” the ministry said.

However, Russia did not mention the name of the European country which supplied the systems to Ukraine.

Recently NATO member Slovakia said that it donated a similar system to Ukraine in the past and they have announced that the S-300 supplied by them was not damaged in the Russian attack.

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“Our S-300 was not destroyed,” Slovakian government spokesperson Lubica Janikova said according to a report in Al Jazeera.

Russian defense ministry also said that coordinated attacks were carried out on missile defense systems in three locations and they were successful in destroying two Ukrainian Su-25 aircrafts near Izyum.

After Ukraine forces managed to push Russian troops away from Kyiv, it seemed that the former may be able to gain control of the regions taken over by Moscow. However, Russia’s advancement in east has raised concerns that the war is far from over.

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On Monday, Russian Foreign Minister Sergei Lavrov said that Moscow will not pause its military operations in Ukraine for subsequent rounds of peace talks

“After we became convinced that the Ukrainians were not planning to reciprocate, a decision was made that during the next rounds of talks, there would be no pause [in military action] so long as a final agreement is not reached,” Lavrov said.