The version that the premise of the tragedy in the metro was broken arrow, is confirmed. This was stated by the mayor of Moscow Sergey Sobyanin. "Version, voiced at present, the Investigative Committee about the faulty arrows way, our independent Commission confirmed as 1 of the key, " he said. And yet all other versions will be the most laborious elaborated and investigated", - quotes the head of the capital, ITAR-TASS reported. Previously, the investigating authorities have put forward 3 official version of the tragedy in the Moscow metro. Option with the terrorist act in this list is not included. About the course of investigation, the mayor of Moscow Sergei Sobyanin told Russian President Vladimir Putin. In addition the head of state listened to the reports of heads of the Ministry of emergency situations Vladimir Puchkov, interior Minister Vladimir Kolokoltseva and health Minister Veronika Skvortsova. "The President also instructed the head of the Investigative Committee (Alexander) Bastrykin to carry out the required investigations and to bring a criminal case on the precedent of the disaster, which led to the death of the inhabitants of our planet", - announced the President's press Secretary Dmitry Peskov. As one of the main circumstances of the tragedy is regarded auto damage of the mount of wheeled carts with subway train carriage. In another version was faulty switch, which, according to the data of the witnesses, and tragedy struck. In addition investigative Committee views as the circumstances of unpleasant events, even, subsidence railway paintings or breakage of the car. All the causes of the disaster that the investigation is considering as realistic, technical. Recall that on July 15 in the morning rush hour on the stretch between the stations "Park Pobedy" and "Slavic Boulevard" blue line of the Moscow underground of 3 cars derailed. For fresh information, 23 people were killed. Only in hospitals are 129 people, including the state of 42 doctors considered as severe.