In Russia-occupied Crimea, the Moscow-appointed head of the city of Sevastopol, Mikhail Razvozhayev, said that Russian defenses downed four aerial drones attacking the city and sank two uncrewed boats near the shore.

A key oil facility in Russia has been hit by a suspected drone strike by Ukraine, with the depot in the Yartsevo district of the Smolensk region catching fire overnight.

Kyiv said that Russia had launched a barrage of drones and missiles across Ukraine, conceding that there were successful

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.

Kyiv on Saturday staged a major drone attack on the Russian city of Kazan, 1,000 kilometres (620 miles) from the frontier, as Moscow's troops captured a new frontline village in eastern Ukraine.

Russia accuses Ukraine of ‘massive’ drone attack that hit luxury apartment in city, some 1,000km from the frontier.

Ukrainian drones hit high-rise buildings in Russia today, presenting a chilling resemblance to the 9/11 attack in the US when planes rammed the Twin Towers of the World Trade Centre in New York in 2001.

The unmanned seacraft has proven to be a game-changer in the naval battle between the two forces, pushing Putin's ships out of the waters around Crimea and back to Russian ports.