The BriefFederal authorities have charged four defendants with operating one of the largest human smuggling rings in the U.S.The group is accused of smuggling approximately 20,000 undocumented immigrants from Guatemala to the United States.

A migrant smuggling operation that helped bring at least 20,000 illegal immigrants into the U.S. has been broken up with the arrest of four Guatemalans.

Two Guatemalan nationals suspected of smuggling thousands of immigrants into the United States illegally, in an operation which led to the deaths of at least seven, were charged by the U.S. Department of Justice Monday.