The government of El Salvador prevented Sen. Chris Van Hollen (D-MD) on Wednesday from visiting Kilmar Armando Abrego Garcia during a trip to the Central American country after the Maryland man was mistakenly deported by the Trump administration.

Van Hollen’s attempts to visit Abrego Garcia, a Salvadoran national previously living in Maryland, and make contact via phone while he’s being held at the country’s notorious high-security prison for terrorists known as CECOT were rebuffed by Salvadoran Vice President Félix Ulloa, according to the senator.