OAKLAND -- Local and federal law enforcement agencies have busted a large indoor marijuana growing operation, confiscating an estimated $10 million in plants from Livermore and Hayward warehouses.

Investigators seized over 2,000 plants, growing equipment, about $1 million and numerous vehicles from late October to early November, the Livermore Police Department and Drug Enforcement Administration announced Thursday.

Some of the marijuana allegedly was grown for Bay Area cannabis clubs, the DEA reported.

Livermore police discovered the first indoor growing operation on Oct. 29 in a warehouse on Bennett Drive. Investigators found about 1,390 plants and arrested 31 people. Police said the majority of those arrested were paid employees secretly brought to the location. Six people were taken into custody and brought to the Santa Rita County Jail.

As a result of the bust, Livermore and San Leandro police served a search warrant at the home of one of the Livermore suspects. Detectives seized cash and vehicles. Evidence led police to a warehouse in Hayward, where they found about 300 marijuana plants.

Investigators then served search warrants at two more Hayward warehouses. Growing equipment, but no marijuana, was located at one of the warehouses.

The DEA joined local investigators and on Nov. 2 two more warehouses in Hayward were searched. The searches netted almost 900 plants. Police did not find suspects at either location.

Three suspects have been charged in federal court in connection with the growing operations, authorities reported.

James Chiaverini, 36, of San Leandro, and Michael Payne, 40, of San Ramon, were charged with conspiracy and manufacturing of marijuana. Payne was also charged with maintaining a place for marijuana manufacturing.

Jayson Westfall, 32, of Discovery Bay, was arrested in late November and charged in federal court with conspiracy, maintaining a place for marijuana manufacturing, and structuring of currency transactions involving financial institutions.

The case is being prosecuted by the Alameda County district attorney's office and the U.S. attorney's office.

Police said the investigation is ongoing with the possibility of more arrests.