March 29 (Reuters) - A Russian strike on the eastern Ukrainian city of Kramatorsk killed three people and injured 13 on Sunday, police said, one of several attacks in frontline areas.
Ukraine's national police said a boy of 13 was among the dead. A statement said Russian forces used glide bombs in the strike on Kramatorsk, which has been a frequent target throughout the four-year-old war pitting Kyiv against Moscow.
Kramatorsk came under a new attack two hours after the initial strike.
Other cities hit in Russian attacks included the nearby town of Oleksiievo-Druzhkivka and the city of Sloviansk, farther north.
Kramatorsk and Sloviansk are heavily defended cities lying on what has been dubbed the "fortress belt" -- seen as key targets in Russia's slow westward advance to capture Donetsk Region.
Reuters could not independently verify battlefield accounts.
(Reporting by Ron Popeski; editing by Jonathan Oatis)
