Russia's defence ministry says the country's air defence systems has "detected and destroyed" a Ukrainian S-200 anti-aircraft missile deployed in an attempted attack on the Crimean Peninsula.
Reuters could not verify the report by the Russian defence ministry, which did not say where exactly the missile was shot down.
Ukraine in recent weeks has stepped up attacks on Crimea, which was occupied and annexed by Russia in 2014.
"On October 7, at about 6pm Moscow time, the Kyiv regime attempted a terrorist attack on the territory of Crimea with an anti-aircraft missile of the S-200 air defence system that had been converted to an attack version," the defence ministry said in a Telegram post.
"Russian air defence systems promptly detected and destroyed the Ukrainian missile in the air," it added.
Meanwhile, a party official in the Russian-held town of Nova Kakhovka in Ukraine's Kherson province was killed by a car bomb on Saturday, the provincial governor said.
Vladimir Malov, executive secretary of the town branch of Russia's governing United Russia party, died in hospital, Vladimir Saldo said in a post on his Telegram channel.
He said it had been a "terrorist attack," meaning one orchestrated by Ukraine.
There was no immediate comment from Ukraine.
Officials seen as supporting Russian rule in the parts of Ukraine that the Kremlin claims to have annexed since its full-scale invasion in February last year have often been targeted in assassination attempts, many of them fatal.
In July, Russia said it had thwarted a Ukrainian attempt to kill Sergei Aksyonov, the Russian-backed head of unilaterally annexed Crimea, arresting an agent before he could blow up Aksyonov's car.
