The French finance ministry confirmed this morning that it had come under cyber attack in December from hackers targeting G20 documents.
Budget Minister Francois Baron said an investigation was underway into the origin of the attacks.
'We have leads,' unconfirmed at this stage, Baroin said.
Earlier, the Paris Match magazine said that the management of the French Treasury department was the prime target of the attacks.
The magazine said the hackers were after 'documents related to the French presidency of the G20 and to international economic affairs'.
The actors were determined professionals and organised. It is the first attack of this size and scale against the French state,' the magazine said.
More than 150 ministry computers had been hacked and numerous documents pirated. Individuals were not targetted in the attack.
