Del Ponte said she had informed the Vatican about her findings, but that the Vatican refused to cooperate.
Frustrated by the wall of silence she has run into in the Vatican, and after months of unsuccessful appeals to leading Vatican officials, including Pope Benedict XVI, Del Ponte decided to speak about the matter in public, the paper reports.
The chief prosecutor of the Hague tribunal visited Rome in July to share her information with the Vatican's foreign minister, Archbishop Giovanni Lajola. The paper reports that Lajola refused to help, saying that the Vatican was not a state and therefore had no international obligation to help the United Nations track down war criminals.
Del Ponte said she did not believe that the Vatican did not have an intelligence service, maintaining that the Catholic Church had the most developed intelligence service.
Del Ponte eventually wrote directly to the pope, but weeks later she still has not received any answer.
Msgr. Maurizio Bravi, private secretary to Archbishop Lajola, has confirmed that there was a meeting between Del Ponte and Lajola, but declined to comment on it.
Asked whether the Vatican's silence was motivated by historical ties regarding Croatia's national issue, Del Ponte said she did not want to speculate but added that her disappointment was great.
Del Ponte also said that the Vatican did not react to her objection presented to Archbishop Lajola concerning Gospic-Senj Bishop Mile Bogovic, who has described the Hague tribunal as a political court committed to distorting the truth about Croatia's history and who described Gotovina as a symbol of victory.