Russia-backed militants violated the ceasefire ten times in Donbas during December 1. This was reported in the press center of Ukraine’s Army HQ press center in Facebook.
Russia's War Against Ukraine
112.ua: Pro-Russian militants use mortars, IFV in Donbas
Pro-Russian separatist soldiers prepare mortar shells near Donetsk's Sergey Prokofiev international airport on Oct. 9, 2014.