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Marin County sheriff’s detectives seized more than 3 pounds of fentanyl and arrested two men suspected of selling the potent opioid.

An undercover detective bought fentanyl from Jesus Samael Irias Gamaz, 26, of Oakland repeatedly over the course of several months, said sheriff’s Sgt. Brenton Schneider. During the most recent purchase on Wednesday, an associate of Irias Gamaz — Angel Henrriquez, 22, of Oakland — was with him, Schneider said.

The transaction happened along Shoreline Parkway near the Marin County side of the Richmond-San Rafael Bridge. Detectives seized approximately a pound of suspected fentanyl that had been packaged for sale and a digital scale, Schneider said.

When they searched an Oakland home related to the investigation, detectives found another 2.2 pounds of suspected fentanyl and $3,000 in cash, Schneider said.

Both men were arrested on suspicion of drug crimes and conspiracy and booked into the Marin County Jail. Detectives obtained bail enhancements for both.

Irias Gamaz remained in custody Friday in lieu of $500,000 bail. Henrriquez remained in custody in lieu of $150,000 bail.

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