US Visa Crackdown: : U.S. won't issue some visas in four nations in deportation crackdown - by A. Mohammed and Y. Torbati

The U.S. State Department on Wednesday will stop issuing certain kinds of visas to some citizens of Cambodia, Eritrea, Guinea and Sierra Leone because the nations are not taking back their citizens the United States wants to deport.

The new policies, laid out in State Department cables sent on Tuesday and reviewed by Reuters, are the latest example of U.S. President Donald Trump's effort to crack down on immigrants who are in the United States illegally.

The cables, sent by Secretary of State Rex Tillerson to consular officials around the world, said the four countries were "denying or unreasonably delaying" the return of their citizens from the United States, and that visa restrictions would be lifted in a country if it accepted its deportees.

Read more: Exclusive: U.S. won't issue some visas in four nations in deportation crackdown