Cubes of fuel laundering waste were dumped under the cover of darkness on a rural road in south Armagh.
And those responsible have been slammed by local political representatives who have accused them of a displaying a complete disregard for the local community.
The toxic sludge was abandoned on the Loughaveeley Road near Crossmaglen .
Sinn Féin Councillor Terry Hearty has expressed his anger and disappointment at the incident.
He said: “I share the anger and frustration of all at this outrageous act.
“Those who dumped their poisonous load there have no respect for the local community or the environment.
“The waste leaks into our fields and drains and ultimately causes untold harm.
“The road closure causes huge inconvenience.”
Once again, he said, local people would pay the price in more ways than one.
Added Councillor Hearty: “The ratepayer picks up the bill for clearing this site. Those engaged in these criminal acts care only about themselves and the money they hope to make.
“They have no care or thought for the damage they are doing to our communities’ health and wellbeing.”