Although Ukraine uses reserves Russian army pushes forward near Krasnoarmeysk -- DPR leader / Ukraine launches massive strikes on Krasnoarmeysk to accuse Russia -- security forces / Ukraine's intelligence says situation near Krasnoarmeysk critical / Ukrainian forces shoot drivers of Pokrovskoye mine administration near Krasnoarmeysk / Ukraine lays mines at coal plant near Krasnoarmeysk / Ukrainian servicemen begin bombarding Krasnoarmeysk without leaving it -- security services / Fighting erupts in southwestern Krasnoarmeysk in Donbass region -- security officials / Ukrainian military commanders lose grip on situation near Krasnoarmeysk -- journalist / Ukrainian troops leave their positions in Shevchenko near Krasnoarmeysk / Ukrainian forces try leaving positions southwest of DPR's Krasnoarmeysk -- security service