Two men have been arrested after a gun and thousands of pounds of cash were found close to three lorry cabs filled with suspected stolen goods.
The haul was found during a raid at a house and equestrian centre in South Milford, North Yorkshire, on Friday.
Surveillance equipment, electrical equipment and cash was seized in a later raid in Bradford, West Yorkshire.
A Bradford man aged 34 and a South Milford man aged 42 were arrested and later released on bail.
West Yorkshire Police said the men were held on suspicion of conspiracy to steal and money laundering offences.
The lorry cabs found in South Milford contained clothing, champagne and electrical goods. The cash and firearm were found inside the house.
Police said the raids were carried out as part of an investigation into thefts of curtain-sided trailers.
Det Ch Insp Fran Naughton, of West Yorkshire Police's economic crime unit, said: "We have been able to recover thousands of pounds worth of items which are believed to have been stolen."