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.

After meeting Secretary of State Marco Rubio, El Salvador's president has offered to house U.S. deportees and even American inmates in his country's "mega-prison."

El Salvador's President Nayib Bukele has agreed to accept deported illegal migrants and violent criminals of any nationality from the United

El Salvador has offered to take in people deported from the U.S. for entering the country illegally as well as the country’s violent criminals — even if they’re American citizens

He met with Salvadoran President Nayib Bukele and senior officials at Bukele's residence on Lake Coatepeque outside the capital for almost three hours, where they agreed to go beyond El Salvador's acceptance of its own deported citizens.

It is unclear whether the Trump administration plans to send incarcerated U.S. citizens to El Salvador. Secretary of State Marco Rubio said the United States is “grateful” for the offer.