Michigan ? More than 200 illegal immigrants were arrested and three officials at a nationwide janitorial service face federal fraud and tax charges after an investigation of cleaning crews at a northern Michigan resort, government officials said.

The detainees – mostly Mexican nationals – who were rounded up early Thursday were working as janitors for Rosenbaum-Cunningham International Inc., or RCI, a Florida-based cleaning contractor.

RCI co-owners Richard M. Rosenbaum, 60, of Longwood, Fla., and Edward Scott Cunningham, 43, of West Palm Beach, Fla., and firm controller Christina A. Flocken, 59, also of Longwood, face criminal fraud, immigration and tax charges in a 23-count indictment unsealed Thursday in U.S. District Court in Grand Rapids.

Their practice of paying cash wages to their workers deprived the U.S. government of about $18.6 million in employment taxes, according to the indictment.

About 203 illegal immigrants who worked for RCI were arrested and expected to be deported, Moskowitz said.

Agents took them into custody at 63 business locations in 17 states and the District of Columbia.