"We lost one soldier in the hostilities in the past 24 hours, and another three were injured," he said at a press briefing in Kyiv on Friday. The Russia-backed militants became more active both day and night. According to the Ukrainian army operation press centre, the militants violated ceasefire 104 times over the past day. In particular, they keep using mortars of various calibres and other weapons banned by the Minsk agreements. The most attacks are traditionally concentrated on villages surrounding militant-held Donetsk.