Missiles struck the Odesa region's energy infrastructure and damaged residential buildings early Thursday, according to Maxim Marchenko, head of the Odesa regional military administration.
"Fortunately, there were no casualties. Power supply is currently being restricted. Our air defense units have shot down missiles," Marchenko said in a Telegram post, adding that a second wave could hit and residents should stay sheltering.
Northwest of Odesa, missiles also struck in the Khmelnytskyi region.
"Remain in your shelters! The enemy is striking the country's critical infrastructure. Take care of yourself and your loved ones!" Serhiy Hamaliy, the head of the Khmelnytskyi region military administration, said in a Telegram post.
In Kharkiv, Mayor Ihor Terekhov said there was a series of explosions.
"I don't have details yet, but I ask that everyone be careful," he said on Telegram. "Our energy infrastructure is in the crosshairs. We are having problems with electricity in some parts of Kharkiv. But we will survive and everything will be repaired."
Oleh Syniehubov, head of Kharkiv's military administration, wrote there were at least 15 strikes.
"There is a threat of repeat strikes! Stay in your shelters!" he wrote.