In particular, three instances of the violation of the ceasefire in the Luhansk sector were reported, the ATO HQ wrote in an update as of 06:00 local time on September 19, which was posted on Facebook.

The enemy resorted to armed provocations in the villages of Novo-Oleksandrivka and Novozvanivka, where militants were firing from small arms.

Read alsoUkraine reports 26 attacks in Donetsk region in last day amid lull in LuhanskWhat was more, nine attacks were reported in the Mariupol sector. Militants were shelling ATO forces stationed near the town of Maryinka, the villages of Pavlopil and Starohnativka, using machine-guns and small arms.

"Six instances of the violation of the ceasefire were reported in the Donetsk sector. The industrial area in the town of Avdiyivka was the 'hottest spot' – the enemy was firing on Ukrainian defenders, using grenade launchers, machine-guns and small arms. The village of Verkhniotoretske also came under small arms fire," the update said.

Further, the enemy started to use long-range rifles in the Mariupol and Donetsk sectors. In particular, the towns of Maryinka and Avdiyivka came under sniper fire.

Read alsoPoroshenko says U.S. drones to contribute to truce in DonbasThree enemy drones were spotted in the ATO zone in the last day, according to the update.

"Despite the provocations, the Armed Forces of Ukraine strictly abide by the Minsk agreements," the ATO HQ said.