The number of people wounded in strikes in the Dnipropetrovsk region has risen to 34, according to local officials.
The youngest child injured in the attack is eight years old, according local governor Serhiy Lysak. He added that two women, aged 44 and 55, are in intensive care for their wounds.
The attack was in the Pavlograd district in central eastern Ukraine.
Russia launched a fresh barrage of missiles in parts of eastern Ukraine on Monday.
Ukraine's Air Defense Forces said it intercepted 15 of 18 Russian cruise missiles fired from the northwestern Russian Arctic and the Caspian Sea regions on Monday.
The Ukrainian military said earlier that the eastern cities of Kramatorsk, Kostiantynivka, and Pavlohrad were targeted in the attacks, along with the Dnipropetrovsk region.