The motive was unclear for the attack, which occurred at a time of heightened concern in France about knife attacks in schools.

One student is dead and at least three people seriously hurt in a Thursday French school stabbing. The 15-year-old attacker was arrested at Notre-Dame-de-Toutes-Aides school in Nantes.

NANTES: A student killed a girl and wounded three other pupils in a stabbing spree on Thursday (Apr 24) at a French private school that prompted demands for tighter security in classes after a series of attacks.