Vets investigating massive fish losses

Vets are investigating massive losses of fish at two locations in central Bohemia. One incident happened at Mlázovice lake north of Prague where the locals found thousands of dead fish –amounting to approximately a ton -which are believed to have died due to a low concentration of oxygen and another 200 kg of fish was lost at the Rokytka stream in Prague where vets suspect a possible contamination of the water.