One man is being questioned following the discovery of a major diesel laundering operation in Co Monaghan.
Revenue officials backed up by gardaí raided a premises just outside Carrickmacross and discovered the facility in a premises.
It is believed it could launder around 3m litres of diesel per year, with a potential annual loss to the Exchequer of approximately €1.8m.
Approximately 12,000 litres of laundered fuel and a truck was seized. Ancillary equipment was also dismantled and seized.
No arrests were made but one man in his 40s is being questioned. Operations are continuing in the area.