The U.S. Treasury Department has imposed sanctions on more than a dozen Mexican companies and four people it says worked with a powerful drug trafficking cartel to scam elderly Americans in a multimillion-dollar timeshare fraud.

The 13 businesses are accused of working with the Jalisco New Generation Cartel, a group designated by the U.S. government as a foreign terrorist organization.

The US Treasury has sanctioned Mexican companies and individuals linked to the Jalisco New Generation Cartel for defrauding elderly Americans in a timeshare fraud scheme. The action blocks American dealings with these entities,