OAKLAND (KPIX 5) – Federal agents raided homes in the Bay Area on Wednesday over an alleged multi-million dollar operation involving counterfeit cash.

KPIX 5 was there when agents searched three homes in the East Bay connected to the investigation.

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The Secret Service told KPIX 5 counterfeiters have printed and distributed $5 million in counterfeit money, the majority in $100 bills. Authorities said the year-long investigation centered in the Bay Area and that the counterfeiters used a sophisticated printing method.

At 6 a.m., agents with the Secret Service and the Department of Justice raided a home on Lacy Street in Oakland, confiscating evidence in the case. A family lives at the home, but wouldn’t disclose who they are and what they confiscated.

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A few hours later, another raid linked to the investigation took place at a home on Douglas Street, also in Oakland. One man was taken into custody on charges related to evidence found at the home.

Agents also raided a home in Castro Valley, searching the property and cars for nearly six hours. No one was arrested at the Castro Valley home, but evidence was taken.

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Officials said additional information about the counterfeiting case will be released in the coming days.