Oregon deputies seized roughly $400,000 worth of fentanyl after capturing tens of thousands of pills and powder in a record seizure, authorities said.

The capture occurred on July 25 after law enforcement officials tracked a wanted person to the Goose Hollow neighborhood of Portland, following a monthslong investigation, according to a release by the Multnomah County Sheriff's Office.

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Deputies "watched the person walk to a vehicle, and at the opportune time, took him into custody," the release read. "After obtaining a search warrant for the person's car and apartment, SIU deputies discovered gallon-sized plastic bags packed with fentanyl pills and fentanyl powder, as well as scales, a manual-operated pill press, a commercial grade pill press, $5,000 in cash and a handgun."

"While processing evidence, deputies determined the bags contained approximately 58,000 individual fentanyl pills and 16 pounds of fentanyl powder. Ten of the 16 pounds of powder was ready to be pressed using the machines into pills. A search of the firearm's serial number revealed the handgun was reported stolen."

At least 10 pounds of fentanyl powder can produce upward of 50,000 pills, according to the release, and 6 pounds of powder recovered from the scene were believed to be intended to be converted into 30,000 pills.

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"In total, it's estimated SIU deputies prevented approximately 138,000 pills from hitting Portland-area streets," the release read. "The combined estimated street value of the fentanyl pills and powder is between $320,000-$400,000."

An investigation into the capture is ongoing, and the identity of the subject has not been confirmed.