Czechoslovakia will kill and incinerate more than 130,000 cows contaminated with toxic compounds, health officials announced Friday.

But they denied that contamination levels posed health risks.According to the trade union daily Prace, the animals' meat and milk contain dangerously high levels of PCBs, or polychlorinated biphenyls.

PCBs are chemical additives that can cause cancer in humans. Contamination of the herds was traced to paint now banned in Czechoslovakia but previously used for agricultural equipment.