Teenager held after shooting at French school

France has reportedly issued a terror attack warning on Thursday after a shooting incident at a school in the southern town of Grasse.

Local media reports said a suspect in possession of several weapons opened fire on the headmaster at the Alexis de Tocqueville school.

The guardian quoted a Police as saying that one suspect had been arrested and a second person was possibly on the run.

The headmaster had been injured but his injuries were not life-threatening.

The suspect who was arrested was a 17-year-old pupil at the high-school.

He was arrested at the school armed with several weapons and grenades.

Residents in Grasse were advised to stay inside and the French government launched its mobile telephone application warning of a "terrorist" attack.

The French Interior Ministry tweeted that the security situation was ongoing and urged people to stay away from the area.