The situation was out of control. Russian President Vladimir Putin stated this at a press conference, when asked why the conflict in Nagorno-Karabakh had resumed right now.
Putin notes reason for escalation of Karabakh conflict
STEPANAKERT, DECEMBER 17, ARTSAKHPRESS: "The tension lasted for many years. I don’t think it happened because of any outside interference. There have been repeated shootings and small confrontations. Ultimately, it all turned into a conflict," Putin said.