HMRC and King's Lynn police have seized thousands of litres of alcoholic drinks from two premises in the town.
An estimated 3,000 litres has been seized as part of the operation from two addresses on Monday, September 3.
A King's Lynn police spokesman said the investigation was being led by HM Revenue and Customs (HMRC) and the police were asked to assist with the seizure and storage of the alcoholic drinks.
This is one of a string of seizures of illegal alcohol and tobacco that have taken place in Norfolk over the past year.
A million illegal cigarettes, with an estimated street value of £500,000, were seized from a number of locations in London Road and Norfolk Street in King's Lynn in June. In January, tens of thousands of illegal cigarettes were seized in raids on two Great Yarmouth shops, with a sniffer dog finding some of the stash hidden in a secret compartment behind a water heater.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here