The oil spill in the Black Sea that has hit Russian and Crimean coasts since mid-December is particularly hard to clean up because it involves a "heavy" fuel that is less likely to float.

The ecological catastrophe began December 15, when two Russian oil tankers, the Volgoneft-212 and the Volgoneft-239, sank ...

In southwestern Russia, thousands of volunteers are cleaning up the beaches polluted by the sinking of two oil tankers in the ...

Russia had suffered heavy losses in five months of fighting Ukraine's forces in southern Russia's Kursk region, the president ...

The Delfa Dolphin Rescue and Research Centre noted a total of 61 dead aquatic mammals had washed up the beach, according to ...

The Black Sea is home to different cetacean species — some endangered — and it was the site of an oil spill in the middle of ...

Large numbers of dead dolphins have washed up on the shores and banks of the Black Sea since two Russian oil tankers collided ...

Delfa Dolphin Rescue and Research Center says it found 61 dead cetaceans with over half killed 'likely due to fuel oil spill' ...

"We can expect the number of injured cetaceans to increase in much greater numbers than usual in the coming months." ...

An animal rescue group said 61 dead cetaceans - an order of aquatic mammals that includes whales and dolphins - had been ...

Russia-appointed officials in Moscow-occupied Crimea have announced a regional emergency after oil was detected on the coast ...