French police came under siege from a large crowd after responding to arson fires in the Paris suburb of Sartrouville, according to reports.
Patrols were deployed ahead of fire crews to assess the security level at a scene of multiple blazes on avenue du Général de Gaulle on Wednesday night.
The fires had been set intentionally to lure officers and first responders while a mob of dozens of assailants lay in wait, authorities now say.
"Once there, the police were assaulted by around forty individuals who threw various projectiles at them," Actu17 reports, citing a police source.
"The police responded with about fifteen tear gas canisters and six shots from defensive projectile launchers (LBD 40)."
The battle lasted for over two hours with virtually all of the insurgents escaping.
Two 15-year-old suspects were taken into custody and have been accused of participating in the violence.
Law enforcement have come under similar attacks in the Lyon suburn of Vaulx-en-Velin in recent days.
'Young people' used fireworks and other explosives to bombard a police station as well as patrol vehicles.
Videos purportedly from the attacks were shared to social media.
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