Russian drones damaged the energy infrastructure in Poltava Oblast and another region overnight on May 18.
Russian drones targeted two energy infrastructure sites in eastern and central regions, Ukraine's National power grid operator Ukrenergo reported on Telegram.
The damage to Poltava Oblast energy facility was reported by the regional governor, Filip Pronin.
No casualties were reported.
The Ukrainian Air Force reported air defense forces shot down all 13 drones launched by Russians overnight on May 18.