Investigative Committee of Russia
On 15 July 2014, the Investigative Committee of Russia opened a criminal investigation of the accident, according to part 3 of Article 263.1 of the Criminal Code (violation of the requirements of transport safety). Supervising examination of the accident site, investigators interviewed witnesses and employees. , the Committee's official representative, said that several causes for the accident were being considered, but that all were technical, there being no connection with terrorist attacks. He stated that certain people would be investigated and suspects would be identified.