A Czech criminal who once boasted that he had a James Bond lifestyle is being held at South Africa's most secure prison because of concerns that he might try to escape.

Radovan Krejcir, who awaits sentencing after being convicted of attempted murder and kidnapping, was transferred late last year from a jail near Pretoria to the prison in Kokstad, in the eastern part of South Africa.

Manelisi Wolela, a correctional services spokesman, said Wednesday that Krejcir was moved to Kokstad because he is a "high security risk."

South African media quoted officials as saying they foiled past escape efforts by Krejcir, confiscating a firearm and cellular telephones in his cell. They also reportedly found a diary detailing an escape plan involving a chartered aircraft that would fly him to Argentina.