At least three civilians were killed in Russian attacks on the Ukrainian regions of Donetsk and Zaporizhzhya, authorities said on Friday, as the embattled nation's president said more money is needed to fend off Moscow's forces.

Deaths have been reported on either side of the border, just hours after a third round of ceasefire talks took place in Turkey.

Ukraine and Russia attacked targets on each other's territory on Thursday after brief direct talks between the two sides failed to make any progress on steps to end nearly three-and-a-half years of war.