London, Nov 21 (IANS): Having vowed to escalate its military campaign against the Islamict State (IS), the Russian airmen have inscribed 'That's for Paris' on the side of one of the bombs they plan to use against the terrorist organisation in Syria, a media report said.

A picture of the bomb was shared from the official Twitter account of the Russian Embassy in Britain, the Independent reported.

Several coordinated gun and suicide bombing attacks on the French capital by Islamists killed 129 people on November 13.

The Russian military, over the last month, has conducted bombing missions in Syria and fired multiple cruise missiles at the IS stronghold of Raqqa, a Syrian city.

Russia has vowed to escalate its military campaign against IS in Syria after it confirmed the Metrojet airliner that crashed in the Sinai, killing 224 passengers, was brought down by a bomb.

British Defence Secretary Michael Fallon previously criticised the strikes, saying they may have killed "several hundred" civilians.