A service station in Ballymoney has been shut down by customs officers after it was found to be selling green diesel illegally.
Officers removed the station's fuel pumps before using diggers to remove storage tanks which had been hidden under the forecourt on Taughey Road.
Almost 1,200 litres of green diesel were removed from the station.
In a separate incident, customs officers arrested a man in the Armagh area on Thursday night.
A lorry carrying five tanks containing 5,000 litres of laundered green diesel was also seized.
The man has been bailed to re-appear at Dungannon Police Station.
"Genuine businesses are already facing difficult times and it is wrong that they should be undercut by these criminals," Beth Smith, Operational Director, Specialist Investigation, for HMRC in Northern Ireland said.
"It isn't about cheating the Government out of a few pounds; it's about depriving our public services of vital funding.
"Motorists using rebated fuels illegally are abusing a tax system, which is there to support and reduce the burden on UK industries such as agriculture."
Investigations are continuing.
© UTV News