A two-year investigation brought down a large marijuana grow operation in northern Arizona this month, according to the Arizona Department of Public Safety.

DPS detectives, federal agents and local law enforcement worked together to arrest 22-year-old Antonio Compau, 20-year-old Niccolo Compau, both of Flagstaff, and 23-year-old Kathryn Miller, of Ash Fork, on July 7 after serving three search warrants.

Officials said the three are facing a slew of charges, including cultivating large marijuana crops, drug possession, drug transportation, drug sales, and illegal possession of firearms, drug paraphernalia and marijuana cultivation equipment.

"Our agents, with our law enforcement partners, will continue to identify, target and dismantle drug trafficking organizations of all levels, who exploit rural areas to conceal their illicit activities," Doug Coleman, Special Agent in Charge of DEA, said.

DPS said marijuana grow operation was based out of Flagstaff and harvested to contacts across the country.