Fire has broken out over a large area of an oil storage depot in southern Russia after officials say it was hit by a Ukrainian drone, Paralel.Az reports citing BBC.

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 oil depot.

The drone strike is the second on Russian oil facilities 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.

Russia's defence ministry said on Friday that its air defence systems had brought down a Ukrainian drone over Bryansk at 06:40 local time (03:40 GMT) and regional head Alexander Bogomaz said later that two further drones had been destroyed without damage.