Ukrainian drone attacks overnight on several Russian power and energy facilities forced capacity reduction at the Kursk Nuclear Power Plant and set a fuel export terminal in Ust-Luga on fire, Russian officials said yesterday.

A drone attack on the Kursk nuclear plant, not far from the border with Ukraine, damaged an auxiliary transformer and led to 50 percent reduction in the operating capacity at unit three of the plant, the plant's press service said.

There were no injuries and a fire sparked by the attack was promptly extinguished, the plant said.

Radiation levels at the site and in the surrounding area have not exceeded normal limits, it added.

About 10 Ukrainian drones were downed over the port of Ust-Luga in Russia's northern Leningrad region, with debris sparking fire at the Novatek-operated terminal -- a huge Baltic Sea fuel export terminal and processing complex, Leningrad Governor Alexander Drozdenko said.

"Firefighters and emergency services are currently working to extinguish the blaze," Drozdenko said on the Telegram messaging app.

There were no injuries, he added.

The Ust-Luga complex, which opened in 2013, processes gas condensate into light and heavy naphtha, jet fuel, fuel oil and gasoil, and enables Russian natural gas producer Novatek to ship oil products as well as gas condensate to international markets, according to the company.

Russian units destroyed a total of 95 Ukrainian drones overnight over 13 regions, including Leningrad and Samara, as well as the Crimean Peninsula, the Russian Ministry of Defense said.

Rosaviatsia, Russia's civil aviation authority, said flights were halted for hours on end at several Russian airports overnight, including at the Pulkovo Airport in the Leningrad region.

Ukrainian drones also attacked an industrial enterprise in the southern Russian city of Syzran, Samara Governor Vyacheslav Fedorishchev said on Telegram, adding that there were no casualties.

He did not say what the targets were or whether there was any damage.

Earlier this month, the Ukrainian military said it had struck the Syzran oil refinery. The Rosneft-owned refinery was forced to suspend production and crude intake after the attack, sources said.

There was no immediate comment from Ukraine. Kyiv has said its strikes inside Russia are in response to Russia's continued attacks on Ukraine and are aimed at destroying infrastructure deemed crucial to Moscow's overall military efforts.

Drone attacks spark fires at Russian nuclear plant - Taipei Times