According to the Brandenburg state government, the cause of the massive fish deaths in the Oder is still unclear.
"We still don't know what exactly caused these symptoms of poisoning in the fish," said Prime Minister Dietmar Woidke (SPD) on Monday in Lebus.
In the small town in the district of Märkisch-Oderland, he got an idea of the situation on the Oder.
Lebus - The Polish side is in the process of searching for 300 substances in its central laboratory, reported the Environment Minister of Brandenburg, Axel Vogel (Greens), on site.
At the present time, it can be ruled out that the fish died from mercury, the minister emphasized.
"Yesterday we were informed by the Polish side that all fish samples that have been carried out so far have shown no heavy metal pollution and no mercury pollution." German and Polish sides are now working together more intensively than was the case in the past, said Vogel.
Experts from both countries want to meet from this Tuesday.
Woidke renewed his criticism of the Polish side's lack of information policy on fish kills in the Oder.
This information came only “a little bit” or “not at all”.
"This urgently needs to be addressed in the coming months," demanded the head of government, who was the coordinator for German-Polish relations for many years.
The German side should have been informed about the fish kill on July 28 near Breslau.
It is now vitally important to know what exactly happened and whether there is still a danger to people and the environment so that further measures can be taken.
dpa