Photo from Ukraine's Defense Ministry

Three Ukrainian soldiers were killed in an attack near the village of Bohdanivka not far from the Ukrainian-controlled strategic port city of Mariupol in Donetsk region on Wednesday, June 27, when the Russian-controlled forces opened fire from proscribed 122mm artillery systems.

They died from lethal wounds, the press center of Ukraine's Joint Forces Operation Headquarters said in an evening update on Facebook on June 27.

One more Ukrainian soldier was wounded in action near the village of Vodiane in the same sector.

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Along with Vodiane, other hot spots in the Mariupol sector on Wednesday were the villages of Lebedynske, Hnutove, and Talakivka, where Russia's hybrid military forces resorted to grenade launchers and small arms.

Enemy casualties are not known yet, the JFO HQ said.

Read alsoUkraine reports 1 KIA, 2 WIAs amid 30 enemy attacks in Donbas in past day

What is more, the enemy opened fire from small arms to attack the defenders of the town of Maryinka in the Donetsk sector.

The situation in the Luhansk sector also escalated: Ukrainian positions near the village of Krymske came under 82mm mortar fire.

In total, the Russian occupation forces mounted 12 attacks on Ukrainian troops stationed in Donbas, Ukraine's east, from 00:00 to 18:00 Kyiv time on June 27, the JFO HQ said. In particular, they resorted to proscribed weapons four times.

As UNIAN reported, new agreements were reached in Minsk on June 27 on a ceasefire in Donbas starting from July 1. The Ukrainian side says that a real ceasefire is possible only if Russia and its militants in Donbas abide by the security provisions of the Minsk agreements.