French investigators who found trace levels of the explosive material TNT on debris of an EgyptAir plane that crashed in May were reportedly prevented from further examining it and the origin of the traces remains unclear. The Egyptian-led investigation committee; however, denied the French team's work had been obstructed and one committee source said that the work is being done jointly according to the conduct of the investigative process. Egypt reportedly wishes to write a joint report with France to validate the presence of TNT on the debris, but France has refused because the investigators were not able to carry out an adequate inspection to determine how the traces could have got there. (Le Figaro, Reuters)