Russia's special forces killed several men linked to the so-called "Islamic State" (IS) group who took two guards hostage at a detention center in the southern city of Rostov, Russia's Federal Penitentiary Service said Sunday. "The criminals were eliminated," Russia's Federal Penitentiary Service said in a statement, describing how a "special operation" had taken place to free the hostages. "The employees who were being held hostage were released. They are uninjured," the statement continued. The siege took place Sunday at Detention Center 1 of the Rostov region, the prison service said. The Interfax news agency said there were six hostage-takers. The men were said to have been armed with knives and other sharpened objects. ....
Russian media speculated that they could be among those convicted of plotting an attack on the Supreme Court of Karachay-Cherkessia, a Muslim-majority Russian republic in the Caucasus.
Deutsche Welle
This is what happened with the Karachay-Cherkessia plot.