President Nayib Bukele has offered to jail deported criminals from the United States. His prisons have earned him a reputation as being tough on crime, but have raised alarms over rights abuses.

El Salvador has agreed to house violent US criminals and receive deportees of any nationality, US Secretary of State Marco Rubio announced Monday, in an unprecedented – and legally problematic deal – that has alarmed critics and rights groups.

El Salvador has agreed to take deportees from the United States and violent criminals from U.S. prisons in an "extraordinary migratory agreement," which Secretary of State Marco Rubio announced Monday.