Islamic State’s magazine has published a photo of what it claims was the improvised bomb that brought down the Russian airliner in Egypt last month.

The picture in Dabiq shows a Schweppes Gold soda can and what appears to be a detonator and a switch.

No explanation is offered and security experts told the BBC it was not clear how the device would have worked.

IS-linked Sinai Peninsula group says it carried out thee attack, which killed 224 people.

Russia has confirmed it was a bomb that brought down the airliner.

On Tuesday, Russia’s security chief Alexander Bortnikov told President Vladimir Putin the bomb equivalent to up to 1kg of TNT had been planted on board the Metrojet Airbus 321 that crashed in the Sinai peninsula on 31 October.

Mr Bortnikov also said “traces of foreign explosives” were found on debris from the plane.

President Putin vowed to “find and punish” those behind the attack.

Nearly all the victims on the flight from the Red Sea resort of Sharm el-Sheikh to St Petersburg were Russian tourists.