More than 30 dolphins died in the Kerch Strait. The reason is a fuel oil spill that resulted from the sinking of Russian tankers, Delfacenter reports. Yesterday, a state of emergency was introduced in occupied Sevastopol.

The amount of oil spilled in the Kerch Strait by two Russian oil tankers is "significantly less than the initial estimate," Russia's Transport Ministry claimed on Jan. 2.

Another tanker was also in distress after sustaining damage, Russian officials said. At least one person was killed.

A dolphin rescue center in Russia says 32 dolphins have died since fuel oil spilled out of two storm-stricken tankers three weeks ago in the Kerch Strait near the Russia-occupied Crimean Peninsula