A man was arrested following the discovery of a fuel-laundering plant capable of producing a quarter of a million litres a year.
The 51-year-old was interviewed by Customs officers after they searched a farm near Banbridge, Co Down.
The hidden factory was dismantled and 750 litres of fuel, a pump and 1,000 litres of waste seized. In follow-up searches a further 600 litres of fuel, a storage tank, pumping equipment and a taxi were also confiscated.
John Whiting, an assistant director at Revenue and Customs, said: “Our activity over the last few weeks has stopped a large amount of laundered fuel entering the legitimate market, preventing further revenue loss and helping our legitimate traders fight unfair competition.
“The waste products from the laundering process can cause considerable damage to the environment.
“Buying illicit fuel not only funds crime, but also supports and encourages these dangerous activities within our communities.”
The man was released on bail after questioning and investigations are continuing.