"Five people died in this tragedy -- three crew members and two passengers," army spokesperson Oleksandr Motuzianyk said.
Ukraine to accuse Russia of 'terrorism' in top UN court
The incident occurred near the village of Malynivka, some 40 kilometres (25 miles) south of government-controlled city of Kramatorsk in the war-torn Donetsk region.
Motuzianyk said that the cause of the crash appeared to be "collision with a power line", but it has yet to be investigated.
Ukraine envoy stresses cooperation
Nearly 10,000 people have died since the start of a pro-Russian rebellion in 2014 that Kiev and the West accuse Moscow of masterminding.
Both Ukraine and the West -- which has imposed sanctions on Russia as a result of the unrest -- say the separatist regions receive military backing from Moscow, although Russia has never officially recognised them.
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