Sisters Anna and Yulia Aksenchenko would have turned 15 in September, Kramatorsk city council's education department said in a Facebook post under a picture of the two girls smiling for the camera.
Asked about the attack on Kramatorsk, the Kremlin said on Wednesday that Russia attacked only military targets, not civilian ones.
A second missile hit a village on the fringes of Kramatorsk, wounding four people.
Russia has frequently hit Ukrainian cities since its full-scale invasion in February 2022.
A missile strike killed 63 people at a railway station there in April 2022, one of the worst single air strikes of the war.
Persons:
Oleksandr Ratushniak, Anna, Yulia Aksenchenko, Volodymyr Zelenskiy, Max Hunder, Anna Pruchnicka, Pavel Polityuk, Peter Graff, Timothy
Organizations:
REUTERS, Kremlin, Russia, Russia's Defence Ministry, Reuters, Timothy Heritage, Thomson
Locations:
Russian, Kramatorsk, Donetsk region, Ukraine, Russia, KRAMATORSK, Ukrainian, Donetsk province