Drugs with a potential street value of £27m have been found hidden in a lorry full of vegetables.
About 400kg of cocaine and heroin were discovered hidden among a load of onions and tomatoes at Killingholme Port in North Lincolnshire.
The National Crime Agency said it was found in an unaccompanied lorry which arrived from Holland on Wednesday.
A Romanian national, who came to drive the lorry, was arrested on suspicion of conspiring to import Class A drugs.
He has subsequently been released under investigation, the National Crime Agency said.
Officials described it as a "substantial seizure which had been taken out of circulation".
The operation was supported by Border Force and Humberside Police.