GILROY -- Four men were arrested and 250 pounds of marijuana seized at an illegal indoor cultivation operation in an industrial area near Highway 101, police said.

Officers were contacted by community members and nearby businesses, who voiced concerns that there might be a marijuana farm within a nondescript storefront in an industrial complex.

"I think the smell was so pungent that someone walking by could tell something was going on," said Gilroy police Sgt. Pedro Espinoza.

Gilroy police detectives began an investigation and were able to confirm the suspicions, and a judge authorized a search of the 6,000-square-foot facility.

Officers went to the site around 9:30 p.m. Sunday and found four men leaving the site, who were arrested without incident, Espinoza said.

Inside, detectives found a "pretty sophisticated operation," said Espinoza, involving several trailers containing marijuana in various stages of processing.

Espinoza said they confiscated about 250 pounds of pot with a "conservative" value of $150,000.

"We sometimes see smaller scale operations but rarely come across one like this in our community," he said.

Arrested were Harry Sorensen and Harry M. Sorensen of San Jose, 69 and 44 years old, who police believe are related. Also taken into custody were Theodore J. Borns, 56, of Gilroy, and Daniel A. Genovese, 37, of San Jose.

Anyone with information about the operation is asked to contact Gilroy police at 408-846-0350.

Contact Eric Kurhi at 408-920-5852. Follow him at Twitter.com/erickurhi.