"Russian equipment is being used," Peskov said, rejecting claims by U.S. and Ukrainian officials. According to the spokesman, all weaponry used by Russian troops comes from domestic arsenals.
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These claims about Russia's use of Iranian-supplied unmanned aerial vehicles (UAVs) against Ukraine have emerged several times.
Early reports claiming a possible sale of Iran's UAVs to Moscow came before Russian President Vladimir Putin visited Tehran in July.
Amid regular reports from Kiev about the presence of Iranian drones in the Ukrainian sky, Peskov said Tuesday the Kremlin has "no such information," noting that "Russian equipment is being used."
On Monday, several drones were spotted flying over Ukraine's capital, Kiev. Without specifying what weapons were used, the Russian Defense Ministry said Russian forces "launched more high-precision strikes against Ukrainian military command facilities and power systems."
Last week, Ukrainian President Vladimir Zelensky said Russia had acquired 2 400 Iranian-made Shahed UAVs.
Ukraine has even severed diplomatic relations with Iran over alleged arms supplies to Russia.
There is no confirmation from Russia or Iran of drone deliveries or alleged missile purchases.