TASS: the decoration of the walls of the Crocus hall could have contributed to the spread of the fire. In addition to being highly flammable, these materials are highly toxic when burned and emit large amounts of toxic smoke.
Earlier, information appeared that an application was filed with the Investigative Committee of Russia to initiate a criminal case for the provision of unsafe services against the owners of Crocus City Hall. Later, Crocus Group announced active cooperation with the investigation into the terrorist attack.