Strikes on Russian oil facilities by Ukraine's newly developed long-range missiles and drones are causing significant gas shortages in Russia, Ukrainian President Volodymyr Zelenskiy says.

On the battlefield, a recent Ukrainian counteroffensive had derailed Russia's plans to capture parts of the eastern Donetsk region, the leader said.

Ukraine's new Palianytsia missile has hit dozens of Russian military depots, Zelenskiy said on Thursday.

The Ruta missile drone, meanwhile, recently struck a Russian offshore oil platform more than 250km away in what Zelenskiy called "a major success" for the new weapon.

Also, swarms of Liutyi and Fire Point long-range drones - up to 300 units in one operation - have hit Russian energy facilities, and Ukrainian forces recently fired Neptune and Flamingo

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