For about the last eight months, several suspects operated a sophisticated marijuana operation in a warehouse just 25 feet from the Los Angeles Police Department's Topanga Station in Canoga Park, police said tonight.

Three men were taken into custody earlier today after officers served a search warrant on the warehouse in the 8400 block of Canoga Avenue.

Growers had built three rooms in the building -- one for seedlings, another for medium-sized plants and one where harvesting was apparently conducted, police said. The lights were controlled so they wouldn't overheat, watering systems were automated and oxygen levels were supplemented by carbon dioxide tanks, according to police.

"It was very sophisticated," said LAPD Officer Karen Raynor.

She said the growers used insulation material to seal cracks in the building. But about a week ago, officers in the station's parking lot noticed something out of the ordinary.

"They happened to catch a whiff of it," Raynor said.

A surveillance operation was launched, and officers obtained the warrant. The names of the three men, who appeared to be in their 30s, were not released because they had not been booked.

-- Robert J. Lopez

Photo: Interior growing room of marijuana warehouse. Credit: KTLA