Islamic State group has released a video threatening attacks in Russia "very soon" in revenge for Russian bombing in Syria, the SITE monitoring group said on Thursday, and the Kremlin said Russian state security services would study the material. Al-Hayat Media Center, the militant group's foreign language media division, released a video in Russian with chants of "Soon, very soon, the blood will spill like an ocean", SITE reported. Islamic State has previously called for attacks on Russia and the United States in revenge for strikes by their warplanes on its fighters in Syria. Russia's security agencies will undoubtedly look into a video, Kremlin spokesman Dmitry Peskov said on Thursday. "I do not know the authenticity of this video, I do not know the authenticity of these sources, but in any case no doubt this will be material for review by our special (security) services," Peskov told journalists on a conference call. *The story was edited by Ahram Online. http://english.ahram.org.eg/News/165409.aspx