Convicted killer Joran van der Sloot moved to remote Peruvian prison after threatening warden

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.

Van der Sloot was the last person seen with Holloway, who vanished while on a graduation trip to Aruba. He is imprisoned for killing Stephany Flores, a 21-year-old Peruvian business student in 2010. He married his pregnant Peruvian girlfriend in a prison ceremony last month.