“Very soon, the blood will spill,” said a new video released by the Islamic State group, also known as ISIS, threatening attacks against Russia, Reuters reported citing the monitoring group SITE Thursday. The new video threatened Russians, saying ISIS would “make their wives concubines and their children slaves.” 

The propaganda wing of ISIS released the Russian-language video as investigations continue into the Oct. 31 downing of Russian Metrojet Flight 9268 in Egypt, which killed all 224 people onboard. An affiliate of ISIS took responsibility for the downing of the flight, saying it was in retaliation for Russian airstrikes against rebels in Syria. Russian officials said Thursday they would investigate the new ISIS video.

The video featured footage of the Charlie Hebdo shootings as well as scenes of executions, the Independent reported. “The kafir throats will tremble from the knives. The Kremlin will be ours,” the video said.

ISIS has called for attacks against both Russia and the U.S. over their airstrikes in Syria. Russia began airstrikes in Syria on Sept. 30, saying it would target ISIS; however, Western officials have said Russia’s airstrikes have also targeted opposition groups who are fighting against the regime of Syrian President Bashar Assad.

Russia has long dealt with domestic terror attacks, especially in the Caucasus region. Arrests and detentions of people possibly connected to terrorist groups have increased in Russia in recent weeks.

Russia put forward a proposal for a political transition in Syria that was expected to be discussed Saturday during talks in Vienna, Bloomberg reported. Russia was expected to ask for a United Nations-backed coalition to conduct airstrikes against ISIS. The war in Syria began in 2011 and has taken the lives of more than 250,000 people and displaced millions.

In January, 12 people were killed at the Paris office of the satirical magazine Charlie Hebdo in retaliation for a cartoon lampooning Islam.