Missiles struck two areas of the city of Sloviansk in eastern Ukraine, according to the city's mayor.
No casualties have been noted so far, Mayor Vadym Liakh said, and authorities are assessing the resulting damage.
Some context: Sloviansk is the main goal of Russian forces trying to push south into the Donetsk region, and has been a key focus since Russia revised its strategy away from northern Ukraine in early April.
According to a report from the General Staff of the Ukrainian Armed Forces on Tuesday, Russians were trying to break through Ukrainian defenses north of Sloviansk, around the settlements of Oleksandrivka and Shandryholove.
This area has seen almost constant fighting for around two weeks, but the Russians appear to have made minimal progress on the ground.