Aug 24 (Reuters) -

Ukrainian drone attacks overnight on several Russia's 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 on Sunday.

A drone attack on the Kursk nuclear plant, not far from the

border with Ukraine, damaged an auxiliary transformer and led to

50% 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's press service 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, regional

governor said.

"Firefighters and emergency services are currently working

to extinguish the blaze," Alexander Drozdenko, governor of

Russia's Leningrad region where the Ust-Luga port is located,

said on the Telegram messaging app. There were no injuries, he

added.

According to Novatek, the Ust-Luga complex, which

opened in 2013, processes gas condensate into light and heavy

naphtha, jet fuel, fuel oil and gasoil, and enables the company

to ship oil products as well as gas condensate to international

markets.

Russian units destroyed a total of 95 Ukrainian drones

overnight over 13 regions, including Leningrad and Samara, as

well as the Crimean Peninsula, the defence ministry 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, Vyacheslav Fedorishchev,

governor of the Samara region where Syzran is located, posted on

Telegram, adding 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 told Reuters.

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.

(Reporting by Lidia Kelly in Melbourne; Editing by Diane Craft,

Christopher Cushing and Lincoln Feast.)