SEATTLE -- Three King County businesses were brothels disguised as tanning salons and spas, said the U.S. Attorney’s Office, Western District of Washington.

Donald Frey, 36, of California and Nguyen Tran Nguyen, also known as Stephanie or Stacey, 26, of Renton, and another person were arrested Tuesday for allegedly having various roles in three King County businesses that were operating as brothels, the attorney’s office said.

The three allegedly booked air travel and arranged transportation for sex workers from other states to work in the King County businesses, said the attorney’s office.

The three businesses were The Aloha Tanning Resort (now closed), at 2828 Sunset Lane NE in Renton, Washington; The Avalon Spa, at 9530 Aurora Avenue North, Seattle, Washington; and the Malibu Tanning Spa at 13985 Interurban Ave. South in Tukwila, Washington.

According to the indictment, during 2007 and 2008 on multiple occasions, women working at the businesses offered to provide sex acts to undercover officers and informants in exchange for cash.

Frey owned the businesses and would fly to Seattle to collect thousands of dollars in cash from Nguyen and others employed as managers at the spa businesses, the attorney’s office said.

In 2006, 2007, and 2008, Nguyen booked more than 70 flights for women traveling from other states to work in the brothels, according to the indictment.

The three face charges of transporting individuals for prostitution and money laundering.