Russia has been targeting the Islamic State group in Syria since 2015
The Islamic State group has beheaded a Russian colonel in Syria, according to media channels affiliated to the militant group.
Russia's defence ministry denied that a Russian serviceman had been captured and executed by IS, Russian news agencies reported.
— Sputnik (@SputnikInt) May 9, 2017
Russia has been directly involved in the war in Syria since 2015, and has been targeting both IS and moderate rebel groups.
The new video, released on Monday and apparently filmed in recent days, was in Russian and also contained a message to Russian President Vladimir Putin, entitled "Complete bankruptcy".
IS Releases Russian-Language Video from Furat Media Showing Beheading of Russian Colonel https://t.co/jMGbjKQs4z
— SITE Intel Group (@siteintelgroup) May 8, 2017
The 12-minute Russian-language video, released on the day Russia celebrates the anniversary of the 1945 victory over Nazi Germany with military parades, showed the man dressed in a black jumpsuit kneeling in a desert scene and urging other Russian agents to surrender.
"This idiot believed the promises of his state not to abandon him if he was captured," a narrator says, before a bearded man beheaded him with a knife.
The Russian serviceman killed in the video is thought to be Evgeny Petrenko, earlier kidnapped by IS and featured in a video message in September.
— Aldin 🇧🇦 (@aldin_ww) May 8, 2017
Speaking in Russian, the man said he was a spy in Moscow, but did not indicate how or where he was captured by the group.
MEE was unable to independently verify the content of the video or IS’s claims.
The Russian defence ministry says about 30 Russian servicemen have been killed since the start of the Kremlin's operation in Syria in September 2015.