French prosecutors said Friday that they had slapped criminal conspiracy charges on former president Nicolas Sarkozy over claims he used Libyan cash for his 2007 election campaign.

The charge for "membership in a criminal conspiracy" was brought on Monday, the prosecutors said.

It adds to charges lodged in 2018 of "passive corruption," "benefiting from embezzled public funds" and "illegal campaign financing" for which Sarkozy already faces trial.

Sarkozy, who was president from 2007 to 2012, has denied any wrongdoing, saying on his Facebook page Friday that his "innocence had been tarnished" by the charges, without "even the slightest proof".

Prosecutors suspect that Sarkozy and his associates received millions of euros from the regime of former strongman Moamer Kadhafi to help finance his election bid.