Two British tourists are said to have been injured by a knifeman who went on the rampage in the centre of Paris before locals playing petanque tried to stop him with boules.
French police have arrested the knife-wielding attacker who injured seven people in the capital, four of them seriously.
The man, who was reportedly carrying a knife and an iron bar, is said to have stabbed three people outside a cinema, the Daily Mail reports.
The attacker, who was described as an Afghan national, went on to target other victims in the head and chest, Le Parisien reports.
One of the Brits was particularly badly hurt by "a stab in the head", while the other was "cut in the chest".