MEXICO CITY (Reuters) -The U.S. Treasury on Thursday sanctioned members of Mexico's Hysa family, alleging they used their sprawling network of casinos and restaurants as fronts to launder funds for the powerful Sinaloa Cartel.

In what the Treasury described as a coordinated move with the government of Mexico, the Treasury sanctioned six members of the Hysa family and one other person, along with their businesses in Mexico, Canada and Poland.

The Treasury also moved to cut off the family's alleged casino fronts in Mexico from the U.S. financial system.

The Hysa family, originally from Albania, has publicly denied ties to organized crime in the past.

"The United States and Mexico are working together to combat money laundering in Mexico's gambling sector," said Treasury Under Secretary John K. Hurley. "Our message to those supporting the cartels is clear: You will be held accountable."

U.S. authorities allege that Luftar Hysa, based between Mexico and Canada, along with his relatives worked with an unnamed person in the United States to move bulk cash from Mexico into the U.S.

The Treasury's announcement comes one day after Mexican authorities said they had suspended operations at 13 casinos for allegedly running schemes to launder millions of dollars abroad. It wasn't immediately clear if the two operations were related.

The Mexican government did not name the shuttered sites, but Grupo Salinas, controlled by magnate Ricardo Salinas, said it operated two of the targeted casinos and denied wrongdoing.

(Reporting by Kylie Madry; Editing by Franklin Paul and Deepa Babington)