SANTIAGO, Chile  —  Representatives of a Jewish human rights organization arrived in Chile on Monday in a renewed hunt for former SS doctor Aribert Heim.

Efraim Zuroff, considered the top Nazi hunter of the Simon Wiesenthal Center, and Sergio Widder, the center's representative in Latin America, are to visit the Chilean southern city of Puerto Montt with other officials this week, and then travel across the Andes to the Argentine resort city of Bariloche.

Zuroff heads the center's Israeli office.

Heim tops the center's list of most-wanted Nazi war criminals.

The center says Heim's sadism as a doctor at the Mauthausen concentration camp earned him the nickname "Doctor Death." If alive, Heim would be 94.

A daughter of Heim has lived in Puerto Montt for years.