State prosecutor says the 48-year-old ex-cop has 'no direct link' to murders though he is still under investigation for arms trafficking.
French authorities probing murder of British family and French cyclist say the 48-year-old local man had 'not appeared on their radar' until now.
A million people on Facebook have backed Nice jeweller who is now under investigation for murder after shooting dead teenager who robbed him.
The 54-year-old, who was arrested on suspicion of conspiracy to murder, has been freed 'pending further enquiries', say British police.
Arrested man is thought to be brother of Saad al-Hilli, who was gunned down along with his wife and mother-in-law and French cyclist last year.
Officers release image of dark-coloured 4x4 they want to trace in connection with murder of engineer Saad al-Hilli and three others in September.
Breakthrough comes more than seven months after members of a British family were gunned down in an isolated beauty spot close to Lake Annecy.
Al-Qaeda's North African offshoot claims that it killed businessman Philippe Verdon on 10 March in retaliation for France's intervention in Mali.
Businessman Ian Griffin, to stand trial for the murder of his girlfriend in a luxury Paris hotel, is bailed from jail amid outcry from victim's family.
The 32 year-old neighbour of a mother who was stabbed and sexually assaulted after going jogging is being questioned as a suspect of her murder.
Three former French soldiers given suspended sentences for their roles in murder of Ivorian man during peacekeeping operations in the African state.
French judges have ordered the reopening of an unsolved investigation into the 1990 rape and murder in Burgundy of a British student.
A 17 year-old boy is in police custody in France suspected of murdering and raping a 13 year-old girl while awaiting trial on a separate rape charge.