Five schools in Aube, including the Chrestien high school in Troyes, received a threatening email of a terrorist nature on the night of Sunday April 24 to Monday April 25, 2024. In this email sent to the ENT (the digital work space which allows teachers to contact high school students and their parents) of each high school and college, the author says "coming from the Islamic State" Following this event, the attack alert was triggered during the morning.

The mayor of Troyes immediately reacted with a press release.