A Twitter account that claims to represent the Nusra Front, an Al Qaeda affiliate and ISIS rival, in Deir ez-Zor, eastern Syria, published photos of 16 letters allegedly from ISIS commanders in Syria.

ISIS deserters who joined the Nusra Front allegedly leaked the letters, posting them with the hashtag #HackingTheSecretMessagesOfBaghdadiState. The letters include (unverified) commands written by commanders of several ISIS provinces in Syria, for militants fighting on the battlefields. All of the letters are dated and signed with the blue ink stamp of “The Islamic State in Iraq and Syria.”

The letters include instructions for sending car bombs to a certain village and suicide bomber to kill a specific Nusra Front leader, as well as instructions for sieging and bombing the city of Deir ez-Zor. These letters even include an order to take responsibility for last month’s terror attack in France. For the time being, ISIS has not broadcast a response and it’s impossible to confirm the authenticity of these documents.

Translation: “To the brother Faruq al-Jazrawi in the information office of the (Islamic) State…please work diligently to take responsibility for the operation in France, in every way possible way. Make contact with the brother who is responsible as soon as you can, he is in the information center of the Deir ez-Zor province. And pass him this issue.”; Stamp: “The Islamic State in Iraq and Syria, Raqqa province.” (Jan. 13, 2015)

الرسالة16 #اختراق_الرسائل_السرية_للدولة_البغدادية الأمر بضرب مدينة #الشحيل بسيارة مفخخة ( وراح ضحيتها اطفال ابرياﺀ) pic.twitter.com/AVxEbIBEqf — ديرالزور جبهة النصرة (@abja77) February 15, 2015

“To the brother Abu Ahmad al-Tunisi–please prepare a car bomb to attack the non-believers of Shejil (a town near Dir e-Zor), and send one of the brothers from the (Arab) peninsula for this operation.”; Stamp: “The Islamic State in Iraq and Syria, Deir ez-Zor province.” (May 13,2014)

الرسالة 9 #الرقة #اختراق_الرسائل_السرية_للدولة_البغدادية الأمر بعدم توزيع الحصص الإغاثية الا على جنودهم pic.twitter.com/riaK5fUXc1 — ديرالزور جبهة النصرة (@abja77) February 5, 2015

Translation: “To the brother Abu Imad, please distribute the relief goods only to the Mujahideen brothers (ISIS fighters) and to no one else.”; Stamp: “The Islamic State in Iraq and Syria, Raqqa province” (Aug. 22, 2014)