Bertrand, who is mayor of the French Guiana commune Saint Laurent du Maroni, was detained in an investigation into corruption linked to the awarding of public works contracts.
The examining magistrate put Bertrand in temporary detention and gave him four days to prepare a defence, RFO said.
Since Chirac stepped down in 2007, he and several former allies have been the targets of corruption investigations, tainting Chirac’s record and leaving a bitter aftertaste from the years when his generation ran France.
