More than 130 endangered seals have been found dead on Kazakh beaches of the Caspian Sea, officials said Wednesday.
"Carcasses of dead seals have been found," a spokesman for Kazakhstan's ecology ministry told AFP.
His ministry said 131 seals had been found dead on Caspian Sea beaches in the country's west.
Autopsies will be carried out and Kazakh environmental experts said soil and water samples from the area would be analysed.
The Caspian seal, the only such species present in the Caspian Sea, the world's largest inland body of water, was placed by the Kazakh government in November 2020 on the list of endangered species threatened with extinction.
The Caspian Sea, the world's largest inland body of water, is bounded by five countries: Russia, Kazakhstan, Azerbaijan, Iran and Turkmenistan.
The seal population of the Caspian Sea has for decades suffered from over-hunting and the effects of industrial pollution.
Experts say there are now about 68,000 Caspian seals, down from more than one million in the early 20th century.