The situation in Donbas remains tense / Photo from

Russia-led troops mounted 23 attacks on Ukrainian positions in Donbas, eastern Ukraine, on Saturday, September 28.

"The enemy fired on the positions of Joint Forces units, using 120mm and 82mm mortars that are proscribed under the Minsk agreements, as well as grenade launchers of various systems and small arms," the press center of Ukraine's Joint Forces Operation (JFO) said on Facebook in a morning update on Sunday, September 29.

Read alsoJFO: Ukrainian soldier fatally wounded amid 24 enemy attacks in Donbas on Sept 27

Since Sunday midnight, the enemy has violated the ceasefire in Donbas three times, using 82mm mortars, grenade launchers and rifles.

No Ukrainian army casualties have been reported.