This video grab photo shows a huge fire at a fuel depot in Sevastopol. Picture used for illustrative purposes only. AFP

"A tank with petroleum products caught fire in Volna village of Temryuksky district. The fire has been assigned the highest level of severity," Krasnodar Krai governor Veniamin Kondratyev said on Telegram, without mentioning the cause of the blaze.

"According to preliminary information, there are no dead or injured," he said, adding there was no threat to residents.

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"Everything possible is being done so that the fire does not spread further."

Volna is at the end of the bridge over the Kerch Strait linking Russia to Crimea, which Moscow annexed from Ukraine in 2014.

In October 2022, the Russian-built bridge was partially destroyed by a truck bomb in an attack Moscow blamed on Ukraine, although Kyiv has denied it.

A fuel reserve is on fire in the Kazachya Bay district of the city. AFP

The bridge serves as a vital link for transporting supplies to Russian soldiers in Ukraine.

Russia and Crimea have been the target of a series of attacks in recent days ahead of an expected counteroffensive by Ukrainian forces, although Kyiv has also not claimed responsibility for the incidents.

A suspected drone attack hit an oil depot in the Crimean port city of Sevastopol on Saturday while explosive devices derailed two Russian freight trains near the border with Ukraine on Monday and Tuesday.

In southern Ukraine's Kherson region, four people were killed and seven injured in Russian strikes, the regional administration said on Wednesday.

Agence FrancePresse