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, Headington, 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 have said the house had been empty for many months.