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 head of Moscow-annexed Crimea warned Wednesday there was a "high risk" the peninsula would suffer severe environmental damage from an oil spill in the Black Sea.

Russian officials have revised their estimates of the oil spill in the Black Sea, now reporting that approximately 2,400 metric tons of oil products were released, a reduction from initial figures.

Thirty-two dolphins have died since fuel oil spilled out of two storm-stricken tankers three weeks ago in the Kerch Strait, ...

Most of the more than 30 dolphins killed in a Russian oil spill in the Kerch Strait were from the endangered Azov species.

During a period of stormy weather in the Black Sea and the Kerch Strait, Russia has lost structures that protected the ...

That's why they're signalling," Interfax cited the Russian Seafarers' Trade Union as saying. The Kerch strait connects the Black Sea and the Sea of Azov and is a major shipping route.

The Kerch strait connects the Black Sea and the Sea of Azov and is a major shipping route. (Reporting by Reuters. Editing by Jane Merriman) ...

The Kerch strait connects the Black Sea and the Sea of Azov and is a major shipping route. Sign up here. The patriarch of Russia's Orthodox Church, celebrating Christmas alongside Kremlin leader ...

That's why they're signalling," Interfax cited the Russian Seafarers' Trade Union as saying. The Kerch strait connects the Black Sea and the Sea of Azov and is a major shipping route. (Reporting by ...