He described: "Having visited the US detention facility at Guantanamo Bay and the Robben Island prison where Nelson Mandela was held, the system at CECOT certainly seems harsher. Terrorists held in 'Gitmo' are at least afforded some privileges and can undergo rehabilitation programs",

The Trump administration and the president of El Salvador said they struck a deal allowing the U.S. to ship detained migrants and imprisoned criminals to a mega-prison there.

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.