A union that helps Mexicans get temporary U.S. work visas has asked Mexico's government for protection after the killing of an employee in its office in northern Mexico.
The Farm Labor Organizing Committee says local police have made no progress in solving the April 9 killing, which happened after the same office had suffered repeated burglaries of the union's files.
The union has asked the government for closed-circuit video monitoring of the office and says it believes the killing and prior break-ins are related to the union's work in protecting migrants' rights.
The group is affiliated with the AFL-CIO, a federation of labor unions in the United States. It fights abuses by unscrupulous Mexican recruiters who overcharge migrants to process their temporary visas.
Some information for this report was provided by AP and Reuters.