Over 200 migrants who were sent to El Salvador's CECOT mega-prison under accusations that they were members of a violent criminal gang are the responsibility of the United States, the government of El Salvador told a United Nations working group.

In response to UN inquiries, Salvadoran authorities denied past US claims and stated that they have only facilitated the use of their infrastructure

El Salvador has said that the US has legal jurisdiction over deported migrants being held in the Central American country, court documents show.