France's Marine Le Pen faces an EU parliament probe after group colleague voted for her

French far-right leader Marine Le Pen faces a parliamentary probe over voting irregularities at the European Union's legislature.

Le Pen acknowledged on Thursday she left her voting card at her desk and that a Dutch group colleague voted in her place during the plenary in Strasbourg, France, this week. Voting is strictly personal at the European Parliament and infractions must be investigated.

"You face a major scandal here" said the head of the EPP Christian Democrat group, Manfred Weber.

In her defense, Le Pen said her colleague had voted without her authorization and called it "a rather unfortunate act."

At home, too, Le Pen is on trial for comments she made five years ago comparing Muslim street prayers to a foreign occupation.