Two Ukrainian soldiers have been killed and another two have been injured in Donbas, eastern Ukraine, since Sunday midnight.

"One soldier of the Joint Forces was killed and another one was injured in enemy shelling today, January 26. Also, one serviceman was killed and one soldier was injured in an explosion of an unidentified explosive device," the press center of the Joint Forces Operation (JFO) Headquarters said on Facebook in an evening update on Sunday.

Read alsoOne Ukraine soldier wounded as Russia-led forces mount 10 attacks on Jan 25

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In total, illegal armed groups of the Russian Federation violated the ceasefire in eastern Ukraine 12 times from 00:00 to 19:00 Kyiv time on January 26.

"The enemy attacked our positions, using 120mm and 82mm mortars, which are prohibited by the Minsk agreements, as well as various systems of grenade launchers, cannons installed on infantry fighting vehicles, heavy machine guns, and rifles," it said.

In particular, seven attacks were reported in the Skhid (East) sector: near the town of Krasnohorivka (twice), the village of Starohnativka (twice), as well as near the villages of Lebedynske, Novohryhorivka, and Hnutove.

Five enemy attacks were recorded in the Pivnich (North) sector: near the villages of Orikhove (twice), Novotoshkivske (twice), and Novotoshkovsky and Krymske, where the enemy used, among other things, 82mm and 120mm mortars prohibited by the Minsk agreements.