A massive fire erupted at an oil depot in Crimea after it was hit by two of Ukraine's drones, a Russia-appointed official there reported Saturday, the latest in a series of attacks on the annexed peninsula as Russia braces for an expected Ukrainian counteroffensive.

Mikhail Razvozhayev, the Moscow-installed governor of Sevastopol, a port city in Crimea, posted videos and photos of the blaze on his Telegram channel.

Razvozhayev said the fire at the city's harbor was assigned the highest ranking in terms of how complicated it will be to extinguish. However, he reported that the open blaze had been contained.

Razvozhayev said the oil depot was attacked by "two enemy drones," and four oil tanks burned down. A third drone was shot down from the sky, and one more was deactivated through radio-electronic means, according to Crimea's Moscow-appointed governor, Sergei Aksyonov.

Ukraine has not publicly claimed responsibility for the drone attack. However, a Ukrainian intelligence official called it "God's punishment" for the wave of Russian military strikes across Ukraine the day before which left at least 23 people.

Russia annexed Crimea from Ukraine in 2014, a move that most of the world considered illegal. Ukrainian President Volodymyr Zelenskyy said in an interview this week that his country will seeking to reclaim the peninsula in the upcoming counteroffensive.

Russian President Vladimir Putin traveled to Crimea last month to mark the ninth anniversary of the Black Sea peninsula's annexation from Ukraine. Putin's visit took place the day after the International Criminal Court issued an arrest warrant for the Russian leader accusing him of war crimes.

The attack reported in Sevastopol comes a day after Russia fired more than 20 cruise missiles and two drones at Ukraine, killing at least 23 people. Almost all of the victims died when two missiles slammed into an apartment building in the city of Uman, located in central Ukraine.

Six children were among the dead, Ukrainian Interior Minister Ihor Klymenko said Saturday, adding that 22 of the 23 bodies recovered have been identified. Two women remained missing, Klymenko said.

A cruise missile also struck a house on the outskirts of Dnipro in central Ukraine, killing a 31-year-old woman named Olga, and her 2-year-old daughter, Veronika. The woman's uncle, Serhi, told CBS News that they had moved to the house from an apartment in Dnipro because they felt it would be safer there.

Serhi said he was notified of the blast in a call from his brother at a hospital.

"They told me to come urgently," Serhi said. "My brother was in shock and he said, 'Sergiy come as soon as possible, Veronika and Olga have died.'"

Russian forces launched more drones at Ukraine overnight. Ukraine's Air Force Command said two Iranian-made self-exploding Shahed drones were intercepted, and a reconnaissance drone was shot down on Saturday morning.

Meanwhile, Razvozhayev said the oil depot fire did not cause any casualties and would not hinder fuel supplies in Sevastopol. The city has been subject to regular attack attempts with drones, especially in recent weeks.

Earlier this week, Razvozhayev reported that the Russian military destroyed a Ukrainian sea drone that attempted to attack the harbor and another one blew up, shattering windows in several apartment buildings, but not inflicting any other damage.

Ukraine's military intelligence spokesperson, Andriy Yusov, told the RBC Ukraine news site on Saturday that the oil depot fire was "God's punishment" for "the murdered civilians in Uman, including five children."

He said that more than 10 tanks containing oil products for Russia's Black Sea Fleet were destroyed in Sevastopol, but stopped short of acknowledging Ukraine's responsibility for a drone attack. The difference between the number of tanks Yusov and Razvozhayev gave could not be immediately reconciled.

Elsewhere, Ukrainian forces shelled the city of Nova Kakhovka, according to Moscow-installed authorities in the Russian-occupied part of southern Ukraine's Kherson province. "Severe artillery fire" cut off power in the city, the officials said.

The Ukrainian-controlled part of the province also came under fire on Saturday. Russian shelling in the area of the village of Bilozerka killed one person and wounded another, according to the Kherson prosecutor's office.

In:
• Ukraine
• Drone
• Crimean Peninsula