Tests on dead fish from the River Odra show no signs of increased levels of dangerous chemicals, the head of the state veterinary institute has told PAP.
Over 106 tons of dead fish recovered from the River Odra have already been disposed of, a spokesman for the Zachodniopomorskie provincial governor has said.
Rare microorganisms known as golden algae found in recent water samples from the River Odra could be the source of the river's contamination, a government minister said on Thursday.
Prosecutors investigating the cause of the massive fish die-off in the River Odra have appointed a team of experts to help both the prosecutor's office and police, the justice minister has said.
Hundreds of firefighters, policemen and soldiers deployed to the Odra have recovered over 100 tonnes of dead fish as scientists continue to scramble to find the cause of the catastrophe.
Dead fish have been seen in the River Odra near the northern city of Szczecin, a provincial official has announced.
Firefighters have pulled almost 100 tonnes of dead fish from the River Odra, a Fire Brigade official said on Tuesday.
The Polish government will allocate funds to restock the River Odra, Mateusz Morawiecki, the prime minister of Poland, wrote on social media on Monday.
No toxic substances have been found in water samples taken from the River Odra, where masses of dead fish have been found, Poland's climate and environment minister has said.
Large numbers of dead fish were found in the Ner river, in the central Łódzkie province, following a similar incident in the River Odra, which flows through Poland and Germany.
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