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 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.

Bukele had offered to take in people deported from the US, regardless of their nationality, and house them in El Salvador's mega-jail. "We can send them and he will put them in his jails," Rubio said.