Two tons of marijuana and $1 million in cash were seized from an organization from China that was running an illegal growing operation in Southern California, authorities said Friday.

Nineteen people were jailed on suspicion of maintaining a drug house, theft of utilities, marijuana cultivation, marijuana sales and conspiracy, the Riverside County Sheriff’s Department said. Authorities served 23 search warrants that resulted in the arrests of residents of Hemet, San Jacinto, El Monte, Rialto, Rosemead, Arcadia and Calexico.

Search warrants also were served in Corona, Eastvale, South El Monte, West Covina and Lower Azusa.

Some 20,000 plants were eradicated and 100 pounds of processed marijuana was seized, a news release said. Deputies also confiscated equipment that can be used in growing operations, including 338 fans, packaging and 620 lights. Southern California Edison found an illegal electrical bypass underneath the electrical meters at 15 indoor grows, the release said.

Deputies froze 25 bank accounts containing an undisclosed amount of U.S. currency.

The searches culminated a four-month investigation into a drug trafficking organization. The San Jacinto Sheriff’s Special Enforcement Team, as it served previous warrants, determined that all the operations were being financed by the same group in the Los Angeles area.

The Los Angeles and San Bernardino counties sheriff’s departments, Hemet Police Department and Riverside County District Attorney’s Office assisted.