Police have surrounded the home of the shooter, who has taken two hostages.
It is believed seven people were shot, killing one, and some stabbed in the city of Bastia.
The gunman is reported to have opened fire before locking himself inside a house with two hostages.
According to actu.fr, one victim is suffering from "serious injuries" and is in a state of "absolute emergency".
A police officer is said to be injured having been shot in the neck.
The incident began in the Montesoro neighborhood at 4.35pm local time (15.45 GMT) and is ongoing.
Police are at the scene as well fire services from the Haute-Corse region.
Two people outside were taken to hospital and two are believed to be trapped inside a house with the gunman.
France3 reports someone was operated on with serious injuries at 6pm local time and two others are being treated at the scene with severe injuries.
According to France3 the shooter is 70 years old.
The motive for the attack is currently unknown but initial reports rule out terrorism.
Bastia is a popular tourist city on the French island of Corsica.
More to follow…
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