A harvested drugs factory was found by police during a raid in Cowley Road, Oxford, today.

Police raided a house after the property's caretaker became suspicious of the tenants' behaviour.

Officers found around 250 large and 100 small pots of cannabis, which had their roots and stalks, but leaves had been harvested.

A large quantity of cannabis leaves were found on the floor and in several bin bags.

Pc Leigh Thompson, drugs co-ordinator for Oxfordshire, said: "Although it is disappointing some of the cannabis may have hit the streets, we have seriously disrupted this operation.

"The caretaker did exactly what we expect landlords to do, and that's keep a close eye on their properties and report to the police anything they think is suspicious.

"With thousands of pounds worth of damage being caused to some properties turned over to cultivating cannabis, it's in landlords' interests to do so."

All rooms apart from the kitchen, bathroom and a small room on the first floor were being used to cultivate cannabis.

The property was found unoccupied and no arrests were made.

Anyone with information should contact police on 08458 505505 or anonymously to Crimestoppers on 0800 555 111.