Police have found an estimated 500 cannabis plants in a house in Oxford, making it one of the largest seizures in the city.

About 20 officers raided the end terrace house in Old Road, Wood Farm, at about 8.15am today and found a cannabis factory inside.

No one was inside the house but police found four rooms filled with cannabis plants.

Scenes of Crime Officers and a forensic team are now at the house. Neighbours said the house had been empty for many months.