Russia declared a regional state of emergency on Saturday in Crimea, which it seized from Ukraine in 2014, as workers cleared tons of contaminated sand and earth on either side of the Kerch Strait following an oil spill in the Black Sea last month.

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

Volunteers are grappling with environmental havoc across more than 35 miles of coastline, after at least 3,700 tons of heavy oil spilled into the Kerch Strait.