France's Budget Minister Jerome Cahuzac, reacts to journalists questions, as he leaves the weekly cabinet meeting at the Elysee Palace in Paris, Wednesday, Jan. 9, 2013. The Paris prosecutors office says it is opening a preliminary investigation into allegations that France's budget minister hid money from French tax authorities in offshore accounts. A statement Tuesday from the prosecutors office said it also intends to open a probe for defamation based on a complaint over the allegations filed by Budget Minister Jerome Cahuzac. (AP Photo/Michel Euler)

PARIS - The man at the forefront of France's fight against fiscal fraud is now one of those being investigated.

Budget Minister Jerome Cahuzac has spent months singling out corporate multinational tax dodgers, citizens who live abroad to avoid taxes and those within France who stash money in overseas accounts. Now he is ensnared in just the sort of investigation he thought would help turn France's finances around, as prosecutors take a close look at an online journal's allegations that he transferred money from a Swiss account into one in Singapore.

Cahuzac has countered with a defamation complaint against the online site Mediapart. So far his boss — President Francois Hollande, who famously said he does not care for rich people — has backed the man he appointed to keep France's finances in line.

It was Cahuzac who tallied the loss last week when France's highest court threw out Hollande's plan to tax the wealthy at 75 per cent. He was the one standing before the cameras, promising to battle fiscal fraud and singling out "a certain search engine" in legal negotiations to regularize its tax situation. And he was the engineer of a 2012 campaign manifesto affirming that that "taxes are a cornerstone of our social pact."

In a statement Tuesday on his website, Cahuzac welcomed the preliminary investigation into his own finances.

"This step will demonstrate my complete innocence of the absurd accusations, which I always have maintained," the statement said.

Jean-Luc Melenchon, a leader of France's far-left party who is no fan of Cahuzac, said the budget minister should nonetheless keep his position for the time being.

"Don't judge him by his arrogant airs, his lordly pretensions or his social liberal insolence," Melenchon said.

France's economy minister and Cahuzac's boss, Pierre Moscovici, went even further on Wednesday, telling Europe 1 "we spent 2012 together and we'll spend 2013 together."

Mediapart has reported that Cahuzac had a secret UBS bank account until 2010, when the funds were transferred to Singapore. The site, which has kept up its stories on Cahuzac since December, maintains a separate section devoted solely to the budget minister despite his defamation lawsuit. It includes a recording, which the site says is Cahuzac's voice, of a man talking about his secret account.

Governments across Europe have cracked down on the practice of using secret accounts to avoid taxes. Switzerland, for example, has begun helping out foreign tax offices, including revealing the identities of account holders.

In Greece, prosecutors of the nearly bankrupt nation recently asked for a new list of Greeks with Swiss bank accounts after fearing that the contents of an earlier list had been altered. Four relatives of an ex-minister were missing from the original list, court authorities have said.

News from © The Associated Press, 2013