By CBSLA Staff

SAN BERNARDINO (CBSLA) – An investigation into illegal marijuana grow operations in San Bernardino lead to the the seizure of nearly 30,000 marijuana plants.

According to the San Bernardino Sheriff’s Department, the bust totals about 6,000 pounds of processed cannabis.

Investigators closed down 130 illegal greenhouses in several cities, including Chino Hills, Fontana and others over the course of one week.

Police said 31 people were arrested and are now facing charges of cultivation of cannabis over six plants and possession for sale of marijuana.