Illegal armed formations shelled Ukrainian positions in Donbas, eastern Ukraine, 35 times on Monday, September 12, the press center of the Anti-Terrorist Operation (ATO) reported on September 13 morning.The truce in the Donetsk sector was violated 16 times. Provocative militant attacks targeted the ATO positions in the town of Avdiyivka, the villages of Luhanske, Zaitseve, Verkhniotoretske, and Novgorodske. Areas near Avdiyivka also came under fire, militants used 120mm and 82mm mortars.The Armed Forces of Ukraine strictly abide by the Minsk peace agreements on Donbas, the ATO HQ said.