Infrastructure was hit in the central Ukrainian region of Poltava during overnight attacks by Russian forces, the Ukrainian military administration reported on Saturday.
The Ukrainian air force said nine of 12 aerial drones sent over by the Russians had been intercepted.
Apart from the drones, Russian forces also launched four S-300 and S-400 missiles. Both are designed as anti-aircraft missiles but have been converted to hit surface targets.
No casualties were initially reported.
Through the winter months, Russian forces turned their focus to attacking Ukraine's energy and heating infrastructure as they did last year.
Kharkiv close to the Russian border in the north-east has suffered repeated power cuts. On Saturday, the state-owned Centrenergo energy company reported that a power and heating plant had largely been destroyed in an attack on March 22.