The United States has expanded a visa restriction policy to target Cuban officials believed to be tied to a labor program that sends Cuban workers overseas, particularly healthcare workers, U.S. Secretary of State Marco Rubio said on Tuesday.

The United States on Tuesday expanded visa restrictions over Cuba's dispatch of doctors overseas, a program Havana sees as a source of influence and revenue but which has long faced accusations of exploitation.

Secretary of State Marco Rubio has announced new sanctions on any individuals from Cuba involved in the communist nation’s program to export medical care to other nations, including U.S. adversaries.