LIMA, Peru (AP) — Joran van der Sloot, the prime suspect in the 2005 disappearance of U.S. teen Natalee Holloway, has been moved to a remote Peruvian penitentiary after authorities said he threatened to kill the warden of the prison where he was serving a 28-year term for murder.

Peruvian prison spokeswoman Janeth Sanchez told The Associated Press that the 27-year-old Dutchman was moved Sunday to Challapalca, located high in the Andes near the Bolivian border. He previously was held at a prison north of Lima.