Laboratory tests following a mass die-off of fish in the Oder River detected high levels of salinity but no mercury poisoning its waters, Poland’s environment minister has said, as the mystery continued as to what killed tonnes of fish in Central Europe.
Anna Moskwa, the minister of climate and environment, said on Saturday that analyses of river samples taken in Poland and Germany revealed elevated salt levels. Comprehensive toxicology studies are still under way in Poland, she said.
Moskwa said Poland’s state veterinary authority tested seven species of the dead fish and ruled out mercury as the cause of the die-off but was still waiting for results of other substances. She said test results from Germany had also not shown a high presence of mercury.
Al Jazeera’s Dominic Kane reports from the Polish-German border.
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