MOSS LANDING, Monterey County (AP) — Authorities in Northern California say deputies destroyed a sprawling opium poppy field that could have produced at least four pounds of heroin per year.

The Monterey County Sheriff’s Office says deputies over the weekend destroyed 27,000 plants growing on a private plot next to a road and another 16,500 plants that had been harvested. Those plants could have produced a pound and a half of heroin.

READ MORE: Slow Recovery Prompts Businesses to Rethink Their Future in Downtown San Francisco

The office says the same plot could have been harvested three times per year.

READ MORE: South Bay Restaurants Raise Money for Anti-Hate Efforts Supporting AAPI Community
Authorities bust an opium field in Moss Landing. (Monterey County Sheriff's Office)

Authorities bust an opium field in Moss Landing. (Monterey County Sheriff’s Office)

It says in a statement officials became aware of a possible opium poppy field in Moss Landing last week. They later confirmed the plants were Papaver Somniferum, commonly known as opium poppies.

Officials say no arrests have been made and they continue to investigate.

MORE NEWS: San Jose State University President Says Ex-Trainer Improperly Touched Athletes

© Copyright 2018 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.