MINNEAPOLIS (WCCO) — Two men face charges after authorities raided an Isanti County residence Monday, finding stolen property, more than 30 guns and methamphetamine on the premises.

The Isanti County Sheriff’s Office says a search warrant was served in Bradford Township with the assistance of the East Central Drug and Violent Offender Task Force.

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An officer spotted a crawl space behind a flight of stairs during the search, which had a false floor. Underneath was a tunnel where authorities found 10 guns; two were later confirmed to be stolen, and two were untraceable.

Investigators needed three days to sort through all the stolen goods found on the property.

Fredrik Koerte (credit: Isanti Co. Sheriff's Office)

Fredrik Koerte (credit: Isanti Co. Sheriff’s Office)

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Five people were arrested, and two still remain in custody: homeowner Marcus Jeffrey Lucas, 61, and 45-year-old Fredrik Keith Kalumaina Koerte, from Minneapolis.

Lucas has been charged with 25 felony counts: 21 for being a felon in possession of a firearm, one for third-degree possession of a narcotic and three for receiving stolen property.

Koerte was charged with two counts of being a felon in possession of a firearm and one count of felony fifth-degree drug possession.

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The sheriff’s office says the stolen property was from 15 burglaries. Of the 32 firearms seized, four were confirmed to be stolen.