They keep using mortars, grenade launchers, and small arms. Most attacks concentrate around the strategic government-controlled seaport Mariupol near the border with Russia, as well as the separatist-held city of Donetsk. Three Ukrainian soldiers were wounded in the hostilities near the town of Popasna in Luhansk region over the past day, military spokesman Oleksandr Motuzianyk told a press briefing in Kyiv on Friday.