According to the Ukrainian news network "Strana.ua", the Ministry of Defence Intelligence General Administration of Ukraine released a video on the 22nd, showing the Ukrainian side using drones to launch attacks on Russian targets in Crimea.
According to reports, a Russian Mi-8 helicopter and two amphibious anti-submarine aircraft were hit in the attack.
At the time of the announcement, there was no response from Russian officials to the allegations, but according to TASS news agency, the Russian Defense Ministry said that Ukraine launched an attack on relevant facilities in the Crimea area on 21 local time, which was a "terrorist act".