Police and Customs and Revenue officers have shut down a fuel laundering plant in County Tyrone.
Plants such as this are used for illegal fuel laundering
They estimate the illegal operation in Sandyholes in Cookstown was worth more than £500,000 in lost revenue every year. One man has been arrested.
Customs and Revenue spokesperson Kieran Dougan said it was a significant find.
"Yet another illegal oil laundering plant has been closed down. Being in the west of the province, it shows that the practice is widespread," he said.