A Russian oil depot has been hit by a drone fired by Ukrainian military officials say.
Russian media say four oil tanks caught alight and the fire then spread over an area of 1,000 sq m (10,763sq ft).
Russian authorities in the Bryansk region say no-one was hurt.
The Bryansk governor said the drone was intercepted near the town of Klintsy and its explosives then fell on the Russian oil depot.
The drone strike is the second on Russian depot in two days.
An unprecedented attack targeted a major oil loading terminal in Russia’s second city, St Petersburg, on Thursday.
Russian reports suggested that drone was shot down without causing damage but there were indications in Kyiv that the attack, so far from the Ukrainian border, marked a new phase in strategy.
“Yes, last night we hit the target. This thing crossed 1,250km (776 miles) last night,” said Ukraine’s Strategic Industries Minister Oleksandr Kamyshin on Thursday.