Ukraine has accused militants of having fired Grad rockets at the Ukrainian military near the village of Hranitne and Starohnativka in Volnovakha district, the press center for the military operation said on its Facebook page on Saturday.

Shelling of the Ukrainian positions with heavy weaponry has lately been risen significantly, it also said.

"The adversary continues to brazenly violate the Minsk agreements over ceasefire and removal over 100-millimeter artillery systems from the dividing line," the press center said.