The Russian troops have also been using electric scooters, motorcycles and ATVs, which allow them to disperse quickly across the front, a Ukrainian official told The Times. The stepped-up attacks have heightened longstanding concerns over how Ukraine manages its military and have countered assumptions that Moscow’s offensive would slow.

Russia's attacks are heightening concerns over Ukraine's military management and countering assumptions that Moscow’s offensive would slow, analysts say.

A Ukrainian sea drone has destroyed a Russian helicopter off the coast of Crimea for the first time. Footage of the attack shared by HUR, Kyiv’s military intelligence, showed the drone bobbing on the seas as the aircraft manoeuvred in the skies above. Plumes of water splashed up next to the Magura V5 drone as Russian fire hit the sea around it.