At least five people were killed in a Ukrainian drone attack on the Russian-occupied town of Tokmak in southeastern Ukraine, according to local authorities.
Another 18 people were injured in the strike on Tokmak, Yevgeny Balitsky, the governor installed by the Kremlin for the Zaporizhzhia region said on Telegram.
Balitsky said the attack targeted an infrastructure site and hit a market in the town.
It was not possible to independently verify the claims.
Tokmak is located just 25km from the frontline.
Ukrainian troops have increasingly targeted Russian supply routes behind the front in recent weeks, with Ukrainian officials asking civilians to leave Russian-occupied areas.
Meanwhile in the regional capital Zaporizhzhia, which is not occupied by Russia, at least two civilians were killed in a Russian glide bomb attack, with another 21 injured, military governor Ivan Fedorov said on Telegram.
The bomb damaged a building housing an industrial company, he said.
The industrial city is located 20km north of the frontline.
Another three people were killed in a Russian attack on the city of Dnipro, to the north of Zaporizhzhia, according to local officials.
Twelve people were injured, including children, regional military governor Oleksandr Hanzha said.
Hanzha said the region was hit by at least 50 Russian strikes during the course of the day.
Across the border in Russia, one person was killed in a Ukrainian missile attack on the western city of Belgorod, local authorities said.
Belgorod mayor Valentin Demidov said the woman suffered fatal shrapnel injuries from the impact.
A power plant was also damaged.
"Energy infrastructure facilities have suffered serious damage. In a number of city districts there are problems with the electricity and water supply," the regional crisis staff said in a statement.
Over four years after Russia launched its war against Ukraine, Russia's own border regions are increasingly feeling the effects of the conflict.
Belgorod is one of the hardest-hit cities.
In Russian-occupied Crimea, a bridge was completely destroyed in the centre of the Black Sea peninsula, the Ukrainian General Staff said, adding that Russian supplies to the frontline in eastern Ukraine have been significantly hampered as a result.
Ukraine also attacked radar installations and an electronic reconnaissance facility near Sevastopol with drones, according to the military.
It was not possible to independently verify the claims.
Large parts of Crimea were without power due to repeated Ukrainian drone attacks, according to Sergei Aksyonov, the governor appointed for the peninsula by Russia.
"At present, more than 10 districts are either completely or partially without electricity," Aksyonov was quoted as saying by Russian state news agency TASS.
"The enemy is attacking the peninsula's power grid with drones on a daily basis," he said, describing the situation as difficult.
