LOS ANGELES (CBSLA) — Doctors were caught up alongside suspected drug traffickers in a crackdown on the opioid black market in Los Angeles this week.

Six people — including several doctors, physician assistants and suspected drug traffickers — were arrested this week by U.S. Drug Enforcement Administration during Operation “Hypocritical Oath,” a play on the Hippocratic Oath that doctors swear by to “do no harm” to their patients.

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With 10 search warrants also executed this week as part of the crackdown, prosecutors say they now have criminal cases against three others, two of whom are doctors, for a total of nine defendants facing charges of diverting highly addictive opioids to the black market.

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“We fight opioid epidemic not only with interdictions and with dismantling drug trafficking organizations, but also by sending a stern message, a stern message to corrupt doctors who seek to profit from spreading addiction,” U.S. Attorney Nick Hanna said at a news conference after the raid at the Northridge home of one of the doctors who was arrested.

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Operation “Hypocritical Oath” led to arrests of medical professionals across the region, from a Kaiser Permanente doctor in Corona accused of illegally distributing hydrocodone to a Del Mar woman who allegedly used her former position at a Beverly Hills doctor’s office to steal a signature stamp and prescription pad to write fraudulent prescriptions.