By Ron Jones

STOCKTON, Calif. (CBS13) — Investigators say a real estate agent inadvertently stumbled upon a major marijuana growing operation in San Joaquin County.

The San Joaquin County Metro narcotics task force carried nearly 1,000 marijuana plants out of a warehouse on the 400 block of North Yosemite Street after the property owner found himself locked out of his own building Tuesday morning.

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The owner called a locksmith and discovered the sophisticated indoor growing system inside the building.

The massive building had apparently been taken over by experienced criminals who changed out the door locks and tapped into an illegal power source.

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“We haven’t seen anything like this… that I know of in probably over a year,” said Stockton Police Officer Pete Smith.

Crime mapping statistics show the area has seen numerous crimes, including robberies and criminal mischief, but investigators can’t remember any recent incidents where marijuana growers took over vacant property in the area.

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No arrests have been made and no suspects have been identified.