A Paris teacher who claimed to have been attacked by a masked assailant who shouted about the Islamic State made their story up, the Paris prosecutor's office has said.
A manhunt was launched on Monday morning after the teacher reported the attack in his classroom in the northern suburb of Paris in Aubervilliers.
It was reported that an assailant in a ski mask and gloves arrived at the Jean Perrin pre-school before class began and attacked the teacher with a box-cutter and scissors.
According to his account the attacker shouted: "This is for Daesh (Islamic State). It's a warning".
The teacher said he had been stabbed in the throat and stomach by scissors and a box cutter.
But police had said he did not suffer life threatening injuries.
This afternoon both the Paris prosecutor's office and the local prosecutor said the teacher was being questioned and had admitted that he made the story up.
It is understood the story about the attack had been based on his testimony.
The Independent has reported that authorities now believe that his slight injuries were self-inflicted.
The motives of the injured teacher remain unclear.
Mayor of Aubervilliers Pascal Beaudet said it was not yet known what had motivated the teacher to lie.
He told the BBC the teacher had 20 years' experience and was "appreciated" by parents at the school.
It comes just a month after the deadly terrorist attacks in France which killed 130 people.
France has been on high alert since the attacks.
No children were present at the time of the incident but other staff members were in the building, local official Philippe Galli said.
Classes at the school have been cancelled.
Earlier Education minister Najat Vallaud-Belkacem went to the school and promised to ensure security at schools around the country.