The Kremlin warned Wednesday that the use of Turkish-made drones could further aggravate the conflict in Ukraine, after Kiev released footage of its military employing the weapons against pro-Russian separatists for the first time.

Ukraine has been fighting a trench conflict in the east of the ex-Soviet country against fighters backed by Russia since 2014, when Moscow annexed the Crimean peninsula, sparking sanctions from the West.

Ukraine's defence ministry late Tuesday published video of what it said was its first use of the Turkish-made TB2 Bayraktar drone in the conflict, targeting artillery.