The assailant armed with a knife attacked other students in the Notre-Dame of Toutes-Ades Lycée in the city of Nantes around 12.30 pm, before being dominated by the teachers.
The French media have reported that the murderer sent a manifesto to classmates before the attack.
It is believed that he is 15 years old.
It is reported that at least one of the injured pupils is in critical condition.
More to follow
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