Maryland Sen. Chris Van Hollen says he has met with Kilmar Abrego Garcia, who immigration officials say was deported by error, in El Salvador on Thursday.

Sen. Chris Van Hollen said Thursday he was denied entry to a maximum-security prison in El Salvador when he tried to check on the “health and wellbeing” of Kilmar Armando Abrego Garcia.

A spokeswoman for the presidency of El Salvador, Wendy Ramos, did not respond to requests for information about Senator Van Hollen’s meeting with Abrego Garcia, including whether he had been returned to the prison where American officials have said he is being held, the Terrorism Confinement Center, or CECOT.