Russia says it killed large numbers of Ukrainian soldiers with a destructive so-called “vacuum bomb” in a claim Ukraine swiftly called nonsense.

The deputy chief of the General Staff of the Russian Armed Forces told Russian Defense Minister Sergei Shoigu during a meeting that up to 300 soldiers were killed “as a result of an accurate strike by an aerial munition,” Russia’s Defense Ministry said on Saturday.

The spokesperson of the Defense Intelligence of Ukraine, Andriy Yusov, told CNN the claims were “absolute nonsense and propaganda as well as Russian information about killing 1500 Ukrainian soldiers in Kursk and Belgorod regions yesterday”.

The spokesperson of the Defense Intelligence of Ukraine, Andriy Yusov, told CNN the claims were “absolute nonsense and propaganda.”

CNN cannot independently verify the incident.