Three suspects have been arrested for smuggling prohibited materials to detainees, including a pistol and an ISIS flag, in a case of terrorist attack.

Three suspects have been arrested on charges of supplying contraband materials to an inmate and other offenses, according to Le Figaro. They are suspected of having delivered contraband packages, including a pistol, to inmates. Searches conducted at the home of a person associated with an inmate led to the discovery of a pistol, a bottle of hydrochloric acid, and a flag of the terrorist organization Islamic State.

The incident was triggered by the discovery of a suspicious vehicle parked near the Longuenesse prison, and the two occupants, brothers born in 2003 and 2005, were detained by the police. This case, if confirmed, represents a thwarted attack without precedent, considering the severity of the materials found and the number of people involved.