Islamic State's magazine posted a photo on Wednesday of what it said was the improvised bomb that brought down the Russian airliner over Egypt's Sinai Peninsula last month.
The photo showed a can of Schweppes Gold soft drink and what appeared to be a detonator and switch on a blue background.
It also published a photo of what it said were passports belonging to dead Russians "obtained by the mujahideen".
It was not immediately possibly to verify the authenticity of the photos carried online in the magazine Dabiq.