One of the largest cannabis factories to be found in West Yorkshire has been uncovered on a Leeds industrial estate.
About 3,000 plants were discovered in a rented industrial unit on the Whitehall Cross Industrial Estate, in Whitehall Road, Wortley, last Thursday.
A West Yorkshire Police spokesman said: "The estimated street value of the plants is £800,000 making it one of the biggest single seizures we have seen."
Police were tipped off after the site owner reported a suspicious smell.
The site has undergone a detailed forensic examination, the plants have been recovered for disposal and inquiries are continuing to trace those behind the operation.
Acting Insp Sue Disley, of the West Yorkshire Police, said: "The scale of this cannabis growing operation puts it among the largest ever found in West Yorkshire and it represents a very significant seizure.
"Once again the vigilance of members of the public has played a vital role in stopping this drug reaching the streets where it can cause damage to individuals and our communities.
"We are very grateful to the public-spirited individuals who alerted us after becoming suspicious about what their premises were being used for.
"This again illustrates the important part the public can play in helping us to tackle organised criminals who think they can get away with growing cannabis on an industrial scale in our communities."