An illegal fuel laundering plant with the capacity to process about 20,000 litres of fuel a week has been uncovered in County Armagh.
The illegal plant which has been closed down
Customs officers say the plant, found in farm buildings on the Armagh to Caledon road, would have meant an annual revenue loss of £620,000.
Officers removed 5,000 litres of contaminated diesel from the site, two miles from Armagh city.
Customs officer Colin McAllister said their work was having an effect.
"This operation highlights our intention to stop organised smuggling and laundering operations," he said.
"The successes we have had over the last week will have disrupted a number of criminal enterprises in Northern Ireland and has stopped a substantial amount of harmful diesel entering the legitimate fuel market."