State regulators mounted dozens of raids against illegal marijuana retailers in Los Angeles this week, the largest crackdown to date against the city’s thriving black market, officials said Friday.

The LA Times reports

The state has been under pressure from California’s legal industry to do more to stop the underground pot economy, which in Los Angeles and other cities often operates in plain sight. According to some estimates, about 75% of sales in the state remain under the table, snatching profits from legal storefronts.

Investigators served search warrants at 24 unlicensed shops from Tuesday through Thursday. They seized $8.8 million in cannabis products and confiscated nearly 10,000 illegal vape pens and $129,000 in cash, officials said.

At one unlicensed cannabis dispensary raided Thursday afternoon in Palms, more than $300,000 in illegal products were seized.

Officers with the state Department of Consumer Affairs and Los Angeles Police Department served a search warrant about 1:50 p.m. to Save Greens at 11221 Venice Blvd., according to the LAPD and the Bureau of Cannabis Control.