Chilean authorities have arrested the wife and four children of former dictator Augusto Pinochet on tax evasion charges.

A judge ordered the arrest of Lucia Hiriart and her children Monday as part of an investigation into millions of dollars kept in bank accounts abroad.

General Pinochet has been indicted for tax fraud for allegedly hiding $27 million in foreign bank accounts.

Pinochet also faces human rights charges related to "Operation Colombo", in which some 119 political opponents disappeared during the former dictator's rule in the mid-1970s.

His lawyers say he is not healthy enough to stand trial, but court-ordered doctors say he is fit enough to do so.

Some information for this report was provided by AFP and Reuters.