The Ukrainian military hit Russia's Tuapse oil refinery in a second attack in less than a week, Kyiv's drone forces commander Robert Brovdi has said in a social media post.
Russian officials said that a Ukrainian drone attack on Russia's Black Sea port of Tuapse sparked a fire and killed at least one person, only hours after a blaze was extinguished after a similar attack on 16 April.
Rosneft's export-oriented Tuapse refinery has capacity to process about 240,000 barrels of crude oil per day and supplies products such as naphtha, fuel oil and diesel.
It was the second assault on the seaport in a matter of days, with drone debris damaging windows in buildings across the city, including apartments, a primary school, kindergarten, museum and church, regional governor Veniamin Kondratiev added.
"Tuapse came under yet another massive drone attack tonight. As a result, one man was killed at the seaport, according to preliminary information. I extend my deepest condolences to his family," Mr Kondratiev said.
Another man was also wounded in the attack and received medical assistance, he added.
On Thursday, a 14-year-old girl and a young woman were killed by a nighttime drone attack on the same city, according to a previous statement by the governor.
Russia's defence ministry also reported that its air defences had "destroyed 112 Ukrainian drones" overnight.
Russia arrests German woman in alleged bomb plot
Russia has said it had arrested a German woman found with a homemade bomb in her backpack in what it alleged was a Ukrainian-hatched plot to blow up a security services facility in southern Russia.
In a statement published by state media, the FSB security agency said the woman, born in 1969, had been dragged into the plot by a citizen from a Central Asian country, who was working on orders from Ukraine.
She was detained and found with an improvised explosive device in her bag in the Caucasus city of Pyatigorsk, the FSB said.
