The Donbas militants conducted 17 attacks on Ukrainian army positions in the past 24 hours, the anti-terrorist operation staff said. In the Mariupol sector, the militants fired mortars of various calibers on Taramchuk and used grenade launchers and infantry combat vehicle weapons against Maryinka and Lybidynske, it said.In the Luhansk sector, Ukrainian army positions came under attack of grenade launchers and mortars.In the Donetsk sector, the militants fired small arms and various types of grenade launchers on the outskirts of Zaitseve and Avdiyivka, the report said.