The parents of Sophie Toscan du Plantier have said they are beginning to doubt the Irish justice system because of the failure to prosecute anyone in connection with the murder of their daughter at her west Cork holiday home 16 years ago.

Speaking after they arrived in Cork from Paris for a Mass in memory of Madame Toscan du Plantier, Marguerite Bouniol said she and her husband Georges were hoping that justice would be done but nothing has happened.

She said they did not see any end to their ordeal.

Madame Bouniol said it was always moving to return to Ireland to the holiday home which her daughter loved.

An investigation in Paris into Madame Toscan du Plantier's death is continuing, under the direction of French magistrate Patrick Gachon.

The family say they also retain confidence in a cold case review of her murder being conducted by a garda team.