French Premier Manuel Valls ominously said in a conference that Islamism was capturing the hearts and minds of the people in France, the country which has the biggest Muslim population in Europe.
Marine Le Pen's far-right National Front did not win any region in French elections on Sunday, in a setback to her hopes of being a serious presidential contender in 2017.
France's Prime Minister Manuel Valls said on Tuesday a deal with Syrian President Bashar al-Assad to reach a political transition was impossible, but said Paris would back regional ground troops if they were to intervene against Islamic State militants.
France plans to build a camp this winter for as many as 1,500 migrants in the northern port city of Calais where twice that many are living in tents and hoping to make the sea-crossing to Britain.
