An Italian journalist has become the fourth person to die after the Strasbourg Christmas market shooting.
It came as the market reopened for the first time since Tuesday's attack, amid tight security.
Paris prosecutor Remy Heitz, who handles terror cases in France, said a fourth person had died, but did not identify the victim.
Italian officials said that the 28-year old Italian Antonio Megalizzi, who had been shot in the head during the attack, was dead.
More than a dozen people were injured when Cherif Chekatt opened fire on the market in the French city.
Mr Heitz said that at least four more were still in hospital with various degrees of injury.
Also, a Strasbourg mosque posted on Facebook earlier to say one of its members, a mechanic named "Brother Kamal", was in a coma after being hit in the head.
Mr Heitz said that Chekatt had been seen by three officers patrolling in the Neudorf district just after 9pm local time.
When police officers identified themselves, Chekatt turned around and opened fire, he said.
"A projectile hit the vehicle above the left rear door, two police officers responded, shooting several times, and killed him."
Investigators found a gun, a knife and ammunition on Chekatt's body.
Chekatt was born in Strasbourg and had dozens of criminal convictions.
He had also been on a watchlist of potential extremists and had reportedly been monitored since 2015.
Seven others are being held over the shooting, including four members of Chekatt's family.
Prosecutors have said they are trying to establish whether Chekatt was helped by others while he was evading police.
On Friday, the market reopened with tight security from police, soldiers and private security guards.
France's interior minister Christophe Castaner, who was there to speak with shopkeepers, said the market had been reopened "for the honour of Strasbourg, for the honour of France".
French President Emmanuel Macron was also in Strasbourg on Friday evening to "pay tribute to the victims" and show "support for the victims' families".
He met security forces deployed in the city to thank them for their efforts.
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