Far-right presidential candidate’s assistants were questioned by the judicial police before this. They are accused of receiving payments for non-existent work.
Marine Le Pen herself thinks the case is political conspiracy against her.
"The French can tell the difference between genuine scandals and political dirty-tricks," she said.
European Anti-fraud Office (OLAF) earlier established that Le Pen's bodyguard, Thierry Legier, and her chief of staff, Catherine Griset, were artificially employed as European Parliament deputies’ assistants.