In exchange for jailing more than 200 deportees, El Salvador’s president, Nayib Bukele, has become a favorite of the Trump administration.

The U.S. has exclusive jurisdiction and responsibility over migrants Trump sent to prison in El Salvador, according to filings at the United Nations

The US government said Wednesday it has located a man wrongly deported to El Salvador and whose whereabouts were previously unknown, adding that he is being held in the country’s CECOT maximum-security prison.