Police uncovered a cannabis factory in Blackpool, containing hundreds of plants potentially worth thousands of pounds.
Officers raided a house in Gladstone Street, South Shore, yesterday afternoon, and today tweeted to say 247 in various stages of growth had been seized.
A Lancashire Police spokesman said nobody was inside the property, and confirmed nobody had been arrested.
Enquiries are ongoing.
Officers responding to reports of suspicious behaviour at a house in Saville Road, also South Shore, found around 140 plants at around 9.40am.
Two men were arrested and the plants were removed.
A Lancashire Police spokesman said: "Two men, one aged 31 from Blackpool and one aged 24 of no fixed address, were arrested on suspicion of producing a controlled drug and are currently in custody."