TASS reports this with reference to a source in law enforcement agencies.
According to the agency, in addition to being highly flammable, these materials are highly toxic when burned and emit large amounts of toxic smoke.
It is noted that all data, documents and certificates of conformity are studied and analyzed.
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.