Drug and Firearms Squad detectives established Strike Force Harthouse in November 2019 to investigate cannabis cultivation and supply across New South Wales.[1] Following that investigation, strike force detectives executed a crime scene warrant at a property on the Golden Highway at Gungal, about 58 kilometres south-east of Muswellbrook, from 9am on Thursday 20 August 2020.[1]

During the search, officers seized 2,628 cannabis plants with an estimated potential street value of A$7.8 million.[1] They also found equipment for cannabis cultivation inside 12 large-scale industrial grow houses, which were dismantled.[1]

Two men aged 24 and 29 were arrested at the property and taken to Muswellbrook Police Station.[1] Both were charged with cultivating a prohibited plant in a large commercial quantity, refused bail, and were due to appear at Muswellbrook Local Court on Friday 21 August 2020.[1] Detectives said investigations under the strike force were continuing.[1]