Venezuelan President Nicolas Maduro has demanded El Salvador release hundreds of Venezuelans who were deported from the United States, who he described as being “kidnapped,” after his Salvadoran counterpart earlier proposed a prisoner swap.

El Salvadoran President Nayib Bukele proposed a deal on Sunday to send 252 Venezuelans deported by the United States and imprisoned in his country back to Venezuela in exchange for the release of detainees in the South American nation,

El Salvador President Nayib Bukele on Sunday proposed sending 252 Venezuelans deported from the U.S. and imprisoned in his country to Venezuela.

President Trump’s aides have dug in on insisting that Kilmar Armando Abrego Garcia was lawfully sent to a prison in El Salvador after the administration had admitted to an “administrative error.”