Prime Minister Andranik Markarian has formed a working group for investigating the causes of yesterday’s crash on Yerevan-Stepanavan route. Minister on coordination of the activity of industrial infrastructures David Zadoyan is committed to head it. Minister of Health Ararat Mkrtchian, first Deputy Minister of Finance and Economy Pavel Safarian, Deputy Minister of Transport and Communication Hrant Beglarian, Deputy Minister of Internal Affairs Ararat Maghtesian are included in the group. According to preliminary information, the underlying cause of the accident was that the engine of the bus was shut off. The driver of the bus could not brake while it was idling.