The UK's 105,700 b/d Lindsey oil refinery has entered a liquidation process.
Prax Lindsey Oil Refinery, Prax Storage Lindsey, and Prax Terminals Killingholme will be wound up, the government said. The parent company, Prax, was approached for comment on the status of operations at the Lindsey site.
Refinery employees appeared to be working, according to Unite spokesman Ryan Fletcher.
Lindsey refinery customers and suppliers have been instructed to contact appointed administrators at FTI Consulting.