French police and firefighters are seen in front of the nursery school where a hooded man claiming to be acting for Islamic State attacked a teacher with a knife in Aubervilliers, near Paris, France, December 14, 2015.
The attack took place at about 7.15am on Monday in Aubervilliers, a north-eastern suburb of Paris.
French media reported that the teacher was assaulted by a hooded man, wearing a mask and gloves, who then fled the scene on foot.
The attacker, who was armed with scissors and a knife, claimed to be from Isis and said “this is a warning”, the local prosecutor in Bobigny told reporters, citing witnesses.
The Paris prosecutor’s office spokeswoman, Agnes Thibault-Lecuivre, said anti-terrorism authorities were looking into the incident.
The assailant was still at large, she added.
The teacher had a small wound to the throat but was not thought to be in critical condition.
He was being treated in the Lariboisière hospital in Paris, Le Monde reported.
France’s education minister, Najat Vallaud-Belkacem, visited the scene of the attack in Aubervilliers, according to Liberation.
Security at French schools and universities had been stepped up as part of the three-month state of emergency in the country, which was introduced by lawmakers in the wake of the Paris terror attack a month ago.