KYIV, Jan 29 (Reuters) -

An overnight Ukrainian drone attack hit Russia's Andreapol

oil pumping station, part of the oil export route via the Baltic

Sea port of Ust-Luga, causing a fire and oil products to leak, a

source in the Security Service of Ukraine said on Wednesday.

The attack also hit a Russian missile storage facility in

Russia's Tver region, causing a string of explosions, the source

told Reuters.

Reuters could not independently verify the information.

The source said the filtration pump site and tanks with

additives were damaged in the attack and that supplies via the

main pipeline to the Ust-Luga terminal had temporarily been

suspended.

A source in Russia's oil pipeline monopoly Transneft

said there had been no disruptions and described the

damage in Tver region as limited.

Ukrainian forces have stepped up drone strikes on

Russian military and energy facilities in recent weeks to raise

the cost of the war for Moscow as the third anniversary of its

full-scale invasion of Ukraine approaches next month.

Its military

said

earlier on Wednesday that it had struck an oil refinery in

Russia's Nizhny Novgorod region in an overnight drone attack and

caused a large fire.

Russia has conducted regular drone strikes on targets in

Ukraine since 2022.

The source said the attack on the oil pumping station

and missile storage facility was a joint operation conducted by

the SBU security agency and Ukraine's Special Operations Forces.