Mourad Hamyd, brother-in-law of Cherif Kouachi who was behind the January 2015 maagazine attack, was detained in Bulgaria.
Belgium has also extradited to France Mohamed Amri and Ali Oulkadi, accused of having helped Salah Abdeslam in November Paris attacks.
The special forces, who are advising rebels hoping to retake IS-held town of Manbij, will not engage in combat with ISIS militants, a French official said.
Soldier in serious condition after being stabbed in southern France by two men who reportedly criticised French airstrikes against IS in Syria.
Campaign in Béziers in southern France to allow Al Elfi family to stay succeeded after a decision to expel them was overturned.
A French jihadist who enrolled in Syria with the al-Nusra Front, allied to al-Qaeda, speaks here about the reasons he left for the war-torn country, his life on the ground and what happened when he returned to France where he is now due to be tried on charges of helping to prepare a terrorist attack. In this, his first interview, the young Muslim convert tells Feriel Alouti: “I don’t minimize what I did but was I a threat to France at any given moment? I went there to help Syrians, not to kill French people”.
Le Parisien, citing intelligence documents, said France began bombing Syria last September to hit IS camp of Paris attacks ringleader Abdelhamid Abaaoud.
Anthropologist Scott Atran, a research fellow with Oxford University who also teaches at University of Michigan and John Jay College in New York, is a leading expert in the study of the motivations of those who join jihadist ranks and the rise of the Islamic State group, and advises governments and international organizations on the issue. In this interview with Joseph Confavreux, he argues that the draw of IS is widely misunderstood, is not limited to disenfranchised communities, and that the organization can only be overcome by a different military, political and psychological approach by Western nations.
Figures show little let-up in numbers joining Islamic State despite bombing of IS strongholds and crackdown by authorities within France.
One of the teenagers returned home after police alert but French officials fear the other 'radicalised' girl could be trying to head for Syria.
Women now make up more than a third of French citizens travelling to Iraq and Syria to join IS, up from just 10 percent in 2010.
Charaffe el Mouadan was said to be a 'direct link' to Abdelhamid Abaaoud, the Paris attacks cell leader, according to US military official.
Call to detect false Syrian passports comes after two of the suicide bombers in the Paris attacks were found to be carrying such documents.
The French president met with personnel aboard the French navy flagship, the spearhead for French airstrikes on Islamic State group in Syria.
As MPs debate joining attacks on Islamic State group in Syria, France regards a 'yes' vote as being of high military and diplomatic importance.