A California man’s alleged drug haul was foiled after he accidentally left behind a backpack containing a massive stash of suspected methamphetamine in a rideshare vehicle, officials said in a news release.

The San Francisco Police Department (SFPD) said authorities recovered roughly three-quarters of a pound of suspected meth after the rideshare driver contacted officers Sunday afternoon.

The drugs have an estimated street value of more than $30,000, according to treatment directory Recovered, which cites typical prices of up to $100 per gram.

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“A suspect’s rideshare trip took an unexpected turn after he left behind a bag containing more than 300 grams of methamphetamine,” SFPD said.

The incident unfolded near the Tenderloin neighborhood, one of San Francisco’s most notorious areas long plagued by open-air drug activity, homelessness and violent crime.

Police identified the suspect as 41-year-old Sacramento resident Jessie Ottman-Comb.

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Authorities said they quickly located Ottman-Comb after working with the rideshare driver to arrange for the backpack to be returned to its owner, ultimately leading officers to a motel where he was staying.

During a search of the motel room, officers reportedly recovered two cellphones, two tablets and drug paraphernalia.

Police seized all the items, along with the suspected methamphetamine found in the rideshare vehicle, as evidence.

In total, authorities recovered 355.7 grams of suspected methamphetamine.

Ottman-Comb was booked into the San Francisco County Jail on charges including possession of methamphetamine, possession of drug paraphernalia, and transportation or sale of methamphetamine.

The investigation remains active, police said.