The chief of staff of French far-right leader Marine Le Pen was put under formal investigation Wednesday after a day of questioning over alleged misuse of EU funds to pay parliamentary assistants.
Catherine Griset was taken into custody for questioning along with Le Pen's bodyguard Thierry Legier, who was later released without being put under investigation, according to a source.
In reaction to the news, Le Pen said she formally denied any wrongdoing in a case that she said was being used to undermine her campaign.
"There is a very big risk of the justice system being manipulated. I think that today the justice system is not doing its work with a cool head, impartiality and independently. Everything indicates so," Le Pen said.
The case has landed her in the spotlight alongside another candidate, Francois Fillon, another right-winger being investigated over public funds he paid to his wife and children as parliamentary assistants.
Griset and Legier are key figures in an investigation opened following demands by the European Parliament that Le Pen repay money she is accused of wrongly paying to the two.
Wednesday's detentions followed a police raid Monday on Le Pen's National Front party headquarters, while she was abroad.