A man has attempted to attack a French soldier with a machete near Paris' famed Le Louvre art gallery.
The soldier opened fire in self defence near the Carrousel du Louvre shopping centre at around 10am local time (9am GMT), police said.
Michel Cadot, the head of Paris police, said the man was "shouting Allahu akbar" and injured the soldier's scalp.
The shot the attacker five times in self defence, hitting the man in the stomach, Mr Cadot added.
He was seriously injured in the incident at around 10am local time (9am GMT) and is being given medical treatment.
A spokesperson for the French interior ministry said a "serious public security incident" was underway, saying security forces were at the scene.
The ministry urged people not to spread "false information" and to follow authorities' instructions.
An American tourist visiting Le Louvre described how sirens sounded before emergency escape doors lifted from the ground.
“Four armed guards then sprinted around the grounds outside of the pyramid entrance looking for something,” he wrote on Twitter.
The Carrousel du Louvre has been evacuated amid a heavy police presence following the incident.
Explosives experts were deployed to check the area for safety and to check a backpack worn by the attacker.
It came following a series of Isis-inspired terror attacks in France, with the group calling on its followers to attack "infidels" and members of the security services.
The group killed 130 people in a series of shootings and bombings in November 2015, and its followers have killed shoppers at a Kosher supermarket, a police officer and his wife and a Catholic priest.