Hispanic civil rights groups said they have joined a global boycott of Hyatt hotels due to "widespread evidence" of substandard working conditions for housekeeping staff, many of them Latinas.

The National Council of La Raza, the Mexican American Legal Defense and Educational Fund and the Labor Council for Latin American Advancement pledged in a joint press release not to hold events of any kind at Hyatt hotels.

"The pattern of exploitation of housekeepers in Hyatt hotels is not only at odds with Hyatt's commitment to hospitality but also inexcusable. For years, Latina housekeepers and their supporters have asked for the most basic and humane changes in the workplace to help reduce injuries and physical strain," NCLR President and CEO Janet Murguia said.

"The global boycott of Hyatt sends a clear statement that consumers expect hotel operators to operate consistently with well-established principles of decency and fairness," MALDEF's president and general counsel, Thomas A. Saenz, said.

The boycott, announced in July 2012 by the group UNITE HERE, aims to pressure the hotel chain to improve working conditions and ensure the right of workers to organize.

The protest has the backing of organizations such as the AFL-CIO, the National Football League Players Association and the National Organization of Women and has so far cost the company more than $27 million, the press release said.

It added that a study published by the American Journal of Industrial Medicine, which examined 50 hotel properties operated by five different companies, found that Hyatt's housekeeping staff had the highest rate of work-related injuries. EFE