PARIS — A teacher who had claimed he was assaulted in a school north of Paris by a man acting for the Islamic State was making up the story, the Paris prosecutor’s office told Reuters on Monday.

“He is being interviewed with a view to establishing the reasons for this invented story,” an official said.

Earlier Monday, other French officials told how the teacher had reported that a hooded man claiming a link to the militant Islamist group had attacked him with a knife-like weapon as he prepared for classes in a school north of Paris.