Police didn't provide information about the identities of the victims, but said they included two British tourists.
Seven people including two British tourists were wounded and four others critically injured in Paris after they were attacked by a man armed with a knife and an iron bar, the police said.
According to initial reports, at least seven people have been injured, including five people who suffered serious injuries.
The incident which occurred Sunday evening (local time) 4 km north of central Paris in the city's 19th arrondissement is not related to terror, Le Parisien reports. Paris Mayor Anne Hidalgo thanked police for arresting the man and the petanque players who intervened.
Police secure the area after seven people were wounded in knife attack downtown ParisBoth were stabbed with the 15-inch blade before a plain-clothes police officer intervened, and then a night patrol helped him arrest the man.
Witnesses cited by French media said a group of men playing boules threw heavy metal balls that are used in the popular game at the attacker, with one hitting him on the head and stalling him.
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Police said that the attack was not being treated as an act of terrorism. They started throwing pétanque balls at him. We said to them: "'Watch out, he has a knife".
On Twitter, French Interior Minister Gerard Collomb praised the "courage and reactivity" of those who intervened.
It is the latest of several knife attacks France has seen in recent weeks.
Four of the people are said to be seriously injured, while the suspect is an Afghan national.
On June 17, two people were hurt in another southern town when a woman shouting "Allahu akbar" attacked them with a knife in a supermarket before being overpowered.