Yassin Salhi, his wife and his sister have been detained by police in Lyon.
The attacks hit Tunisia, Kuwait, France and Somalia in a day of bloodshed marking first year of Islamic State.
Murder rate in 2015 almost doubled after series of killings across London in June.
Attacker was under surveillance in 2006 and has ties to Salafist Islam.
A man carrying an Islamist flag joins attackers from Islamic State targeting France
Boy was taken to John Radcliffe hospital, where he later died. Police have closed bridge.
Remains believed to be that of former monk Joe Lynskey.
Serge Atlaoui's appeal against death penalty on drug offence rejected by Indonesian court.
Facebook claims it doesn't have his identity
The little girl's body was discovered by a woman walking her dog on 25 June.
The victims were forced to 'repent' for their actions before being brutally beheaded.
In one of the worst infanticide cases in French history, woman is charged with suffocating eight of her babies.
Trevor Gibbon stabbed neighbour Alison Morrison to death after being handed a restraining order.
Six women have been killed in just over a year in the small town of Chillicothe.
Met Police launches investigation after two stabbed in Hackney, North London.
Guard allegedly hid screwdriver and needle-nose pliers in frozen meat given to killers.
Regina police want people to stop performing a dare using Siri, prompted by social media posts.
18-year-old Leung Ka-lok fled after freeing himself from chains and handcuffs.
Leicester teenager Victoria Halliday was last seen two days ago near her home in Broughton Astley.
Eyewitness said passengers poured water on the victims' faces near South Tottenham station
He spent almost nine months in jail before his conviction and seven-year jail sentence in November 2012.
Corrections officer Gene Palmer says he didn't know hacksaw blades were hidden in frozen meat he passed on.
Couple sues their home's previous owners for neglecting to tell them the house has a stalker.
Gordon punched her, dragged her by the hair, stole money after she was comatose, says suit
Bougherra was kidnapped, blindfolded and taken to the desert before the prank was revealed.
Police have released footage of robbers threatening staff before escaping with £186,000 of watches.
Judge said he would have sentenced Rebecca Minnock to 28 days for flouting court orders.
The highly acclaimed former headteacher was described as a 'sexual predator'.
As Eurostar services return to normal, lorry drivers say migrant situation in Calais is at a nadir.
CCTV footage shows moment group of masked men grabbed timepieces from Altrincham jewellery store.