An image has surfaced online regarding the bomb that took down the Russian plane over Egypt last month. The Islamic State, which claimed responsibility for the tragedy, said in a new image online that the bomb was hidden in a soda can.

The image was included in the latest issue of the terrorist group's magazine. According to ABC News, it showed a soda can - what appears to be Schweppes Gold soft drink - what has been identified as a blasting cap and an electric initiator. The magazine on which said image is printed on read, "the IED used to bring down the Russian airliner."

The magazine's publication comes just a day after Russian officials concluded a bomb was responsible for taking down the plane.

The magazine printed in English, "The divided Crusaders of the East and West thought themselves safe in their jets as they cowardly bombarded the Muslims of the Caliphate. And so revenge was exacted upon those who felt safe in the cockpits."

Dabiq magazine also published a photo of what they said were passports belonging to dead Russians. However, Reuters noted that at this point, it is not yet possible to verify their authenticity.

Among other things that the Islamic State admitted to is how they planned on bringing down a plane from a country that participated in the US-led coalition bombing in Syria and Iraq. However, they changed their course when Moscow started its own air strikes in Syria.

The group added, This was to show the Russians and their allies that they will have no safety in the lands and airspace of the Muslims. That their daily killing of dozens in (Syria) through their air strikes will only bring them calamities.

Even though the Islamic State had admitted to shooting the Russian jet and even explained how they did it, Amercian experts still remain unconvinced that the group's claim is totally true, states ABC. An official noted, "If I just pulled off a successful bombing, I would give you disinformation. Why would you tell everyone how you did it?"

Authorities leading the investigation have yet to figure out exactly how the plane went down and are still discussing different theories. The head of Russia's FSB Security, for instance, told President Vladimir Putin that his experts thought it to be a homemade explosive with about two pounds of TNT.

A former special operations soldier suggested that the bomb may have been detonated manually by someone on board. Meanwhile an explosives expert, from the NYPD bomb squad, reckons it may have been detonated by a timer, which is the same theory supported by a senior US official - who was briefed on the situation.