The 14-year-old who shot his principal and a teacher at his school in Aubagne has been charged with terrorism offenses. A researcher links nine school attacks in France since 2008 to the online movement glorifying mass killers.
The incident prompted unions at the French shipping giant to criticize the company's lack of transparency, while a growing number of captains are refusing to sail through the strait.
The far-right presidential candidate argued for cutting France's financial contribution to the European Union, but her usual partners stopped short of endorsing her demands.