A multi-agency investigation that started with the 2023 explosion of a honey oil lab in Irwindale where four men died led to the arrest Wednesday of six people and the seizure of about 27 tons of illegal cannabis products with an estimated street value of over $100 million.

District Attorney Nathan Hochman called it one of the biggest illegal cannabis operations in Los Angeles County during a Friday news conference at the Hall of Justice in Los Angeles.

The investigation, dubbed Operation Sugar Diamond, involved federal, state and local agencies.

On Wednesday, authorities served nine search warrants at various locations including one of the suspects’ homes, two South El Monte warehouses, a South El Monte office, a large drug lab in La Verne and a Gardena distribution center, Hochman s

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