Stark message tells viewers that rather than 'defending a just cause' jihadists will 'discover hell on earth and will die alone far from home'.
French defence minsistry admits explosive experts, former French Foreign Legion troops and elite Parachute Brigade have joined jihadist forces.
The arrests for 'conspiracy to prepare acts of terrorism' focussed on a network allegedly based in the south-west city of Toulouse.
Disquiet in Mali that French hostage Serge Lazarevic was freed in exchange for release of a notorious Malian 'terrorist'.
The seven-minute film shows several men, faces visible, tossing their passports onto a bonfire and encouraging terror attacks in France.
The three men, extradited from Turkey, include the brother-in-law of Toulouse gunman Mohamed Merah who murdered seven people in 2012.
The French Prime Minister said French action against IS will go on despite Algerian Islamist group's threat to kill a French hostage.
Two minors were among those arrested near Lyon on suspicion of recruiting young women to fight in Syria.
Young Frenchman says jihadists use online method showing shocking images that paint the Western world as degenerate and corrupt.
Salman bin Abdul-Aziz and President François Hollande will discuss a Saudi-financed French weapons deal to help counter jihadist threat.
Proposed bill includes ban on foreign travel for individuals suspected of being radicalised, plus powers to confiscate their passports.
The French interior ministry said that the 28-year-old Tunisian played 'a key role' in the recruitment of young jihadists in the Grenoble area.
The recent arrest of a French citizen accused of a murderous attack at a Jewish museum in Belgium has highlighted the growing problem of jihadists returning from Syria to wage war in their own countries. More than 2,000 European citizens, including 630 French residents, have gone to fight against the Assad regime since 2011, according to recent figures. And some, at least, of those who return come back intending to use their combat training to carry out terrorists attacks at home. As Louise Fessard reports, the numbers involved are so great that European security forces, including those in France, are struggling to cope.
French interior minister says the six arrested in Strasbourg are suspected of participating in a jihadist network, and recently traveled to Syria.
Concern as Islamist groups targeted by France's Operation Serval appear to be regaining footholds despite presence of 6,000 UN troops.