POLICE discovered more than 7,000 cannabis plants at a raid on a farm in Haddenham on Thursday.

POLICE discovered more than 7,000 cannabis plants at a raid on a farm in Haddenham on Thursday.

The huge haul, which officers estimate could have been worth about �2.5 million if left to reach maturity, was discovered at Tree Farm on Hill Row following a morning raid at the property.

Officers believe it could be the largest haul of cannabis ever seized in the county.

A 41-year-old man from Haddenham, a 40-year-old from Warboys and two men from Huntingdon aged 24 and 29 were arrested on suspicion of producing the cannabis and are being held at Parkside Police Station in Cambridge.

The drugs were found spread across two floors in the large barn house with sophisticated growing and cultivation equipment also discovered. Police dog units and the force helicopter was also on the scene to help with the raid.

Detective Inspector Craig Harrison, who led the operation, said: “The raid was part of our ongoing work to tackle the production and supply of cannabis in the county.

“We discovered thousands of plants and believe this to be the biggest ever cannabis farm in Cambridgeshire.”

Officers and forensic teams were stil at the scene on Friday morning, although all the remaining plants had been taken away.