Their attacks included the use of heavy arms. They shelled the Ukrainian forces with artillery, mortars, grenade launchers, and small arms. Most attacks are reported near the strategic government-controlled seaport Mariupol near the border with Russia, and in the vicinity of separatist-held Donetsk. One Ukrainian soldier was injured in the hostilities in the past day, military spokesman Oleksandr Motuzianyk told a press briefing in Kyiv on Wednesday.