Ten lorries and a van were seized by the PSNI following the discovery of a suspected fuel laundering plant in Co Fermanagh on Monday.
Police say officers were conducting patrols in the Lisnaskea area when they came across a lorry which was baring false plates.
After the vehicle was stopped in a nearby yard it was discovered the lorry was also not insured and had not been taxed since 2011.
“District Support Team in conjunction with HMRC and Enniskillen Road Policing Interceptors carried out further enquiries in the yard and located several other lorries using rebated fuel,” a PSNI statement said.
“As a result HMRC have seized a total of 11 vehicles which include 10 lorries, a van, 2 trailer units and uncovered what appears to be a fuel laundering plant with hundreds of litres of rebated fuel.
“Enquiries are ongoing by Police, HMRC and DVA.”