REUTERS

"Late last night, the enemy intensified shelling of Ukrainian positions in the ATO zone. After 18:00 local time, provocations with the use of small arms became more frequent both in the Donetsk and Mariupol sectors," the ATO HQ said in an update on Facebook on Sunday morning.

Read alsoUkraine army positions in Donbas attacked 24 times in last dayIn particular, Ukrainian positions near Avdiyivka's industrial zone came under fire four times – the militants used small arms and a grenade launcher. In the evening and at night, the enemy attacked Ukrainian troops stationed near the villages of Zaitseve and Kamianka twice, near the village of Mayorsk three times.

Russian proxies also shelled Ukrainian positions near the village of Vodiane in the Mariupol sector four times, using a grenade launcher, a large-caliber machine gun and small arms, the ATO HQ said.

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Read alsoOSCE observers spot military hardware in militant-controlled areas of DonbasAttacks on Ukrainian positons with the use of small arms were reported near the villages of Talakivka and Hnutove, while the village of Shyrokyne, which is about 23 km from the Ukrainian-controlled strategic port city of Mariupol, came under fire from a large-caliber machine gun twice.

The situation in the Luhansk sector was relatively calm. However, at about 20:00 local time on Saturday, Russian-backed militants opened fire from a grenade launcher near the village of Novozvanivka, the ATO HQ said.

Most of the provocations did not last long, it added.