Ten people have been injured at a Christmas market in Nantes, western France, after a man drove a van into shoppers, Reuters reported, citing an official at the local prefecture.
Five people suffered serious injuries, including the driver, the official said.
According to local newspaper Ouest France, citing a police officer and witnesses on the scene, the driver of the white van shouted "Allahu Akbar" ("God is greatest" in Arabic) and then stabbed himself with a knife.
The Christmas market was evacuated and secured by police.
Security measures for police and other authorities have been stepped up after a driver said to be shouting "God is great" slammed into crowds in a French city, injuring at least 11 people and raising national concern as Islamic extremists call for attacks.
The government said the man's motives were unclear but last night's incident in Dijon, in eastern France, came a day after a knife attack on police in another town being investigated by anti-terror officers.
Officials say a 40-year-old man had been arrested over last night's attack.
A driver said to be shouting "God is great" slammed into passers-by in several parts of Lyon, France, injuring 11 people and raising national concern.
The government said the man's motives were unclear but last night's incident came a day after an attack on officers in another town being investigated by anti-terror police and amid general concern after several threats by Islamic extremist groups calling for attacks against the country.
The Interior Ministry said a 40-year-old man had been arrested over last night's attack.
Police union official Michel Bonnet said some witnesses apparently heard the Renault Clio driver shout "Allahu Akbar" - God is great - and refer to the "children of Palestine", but the ministry would not confirm that.
Interior minister Bernard Cazeneuve will go to Lyon today.
A day earlier, French police in a Tours suburb shot and killed a man also shouting "Allahu Akbar" who had stabbed and wounded three officers in a police station.
A driver shouting "God is great" in Arabic has reportedly driven into a crowd of people in the eastern French city of Dijon leaving 11 people injured, two seriously.
Images posted on social media in the immediate aftermath appeared to show paramedics treating multiple casualties in the road.
A source told AFP news agency that the motives of the attacker remained "unclear".
The reported attack comes just a day after a man was shot dead after attacking three police officers with a knife in Joue-les-Tours.
French police have said they are investigating the potential terror links of a man who was shot dead after launching a knife attack at a police station that left two officers seriously injured.
A police spokeswoman said the man was killed after he attacked the policemen in a station in Joue-les-Tours, a suburb of the central French city of Tours.
The Paris Prosecutor's office confirmed a counter-terror investigation has opened for "attempted murder and criminal conspiracy in connection with a terrorist organisation".
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A British businessman jailed for murdering his fiancée in a Paris hotel room struggled with his emotions during the trial as he denied the charge.
Ian Griffin claimed he had blacked out and could not remember a thing from the night Kinga Legg died.
Addressing the jury before they went out to consider their verdict, he said:
The most important thing is to apologise to her parents.
To think I could do that to the girl I loved, that's killing me. I have been through every regret, every emotion.
I would give my life for hers tomorrow.
The jury at the Cour D'Assises in the French capital took five hours to find him guilty.
The brother of murdered millionaire Kinga Legg has welcomed a jury's guilty verdict against her killer, then-fiancé Ian Griffin.
Marek Wolf said he believed the decision and the sentence were the right ones, though added it was only minor comfort to his family.
I need to say it was the correct verdict and decision. I'm glad that after three years the trial is finished but nobody can give me or my parents my sister back.
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