Experts with the Forensic Sciences Institute of the French Gendarmerie (IRCGN) said they they detected signs of the explosive chemical compound trinitrotoluene on the wreckage.
The results have been disputed by Egyptian authorities, who claim they did not allow French officials to examine the debris in detail, according to French newspaper Le Figaro. While Cairo has expressed a desire to write a joint report to validate the presence of explosive material, Paris has refused.
The flight crashed into the Mediterranean in May while flying from Paris to Cairo. While the official cause of the crash remains unknown, the plane’s flight recorder revealed evidence that a fire had been reported onboard ahead of the crash.
All 66 people onboard the plane were killed.