KYIV, Ukraine — Russian bombs struck an apartment building on Saturday in Kharkiv, Ukraine’s second-largest city, killing at least one person and wounding nine, including a 6-year-old child, authorities said.

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A body was pulled from the rubble hours after the attack, Mayor Ihor Terekhov said on Telegram. He said that the bombs slammed into the low-rise building in Kharkiv’s Kholodnohirskiy district in the early hours. The head of the regional administration, Oleh Syniehubov, said that at least nine people were wounded, five of whom were hospitalized.

Elsewhere in Kharkiv, a Russian drone struck a civilian vehicle on Friday evening, killing a man and wounding the woman who was driving the car, Syniehubov said.

Later on Saturday, Russia again launched guided bombs at Ukraine, striking the outskirts of the northern city of Sumy, according to local administration head Oleh Hryhorov. The attacks killed a male civilian and damaged at least 20 private houses, Hryhorov reported on Telegram.

Russian strikes on the southeastern city of Zaporizhzhia killed at least four people and wounded six others, according to regional administration head Ivan Fedorov. Guided aerial bombs were used in the attacks.

Moscow didn’t immediately acknowledge or comment on the attacks.

Ukraine’s air force said that it shot down 92 of 99 Russian drones launched overnight and that seven struck targets in three locations.

Meanwhile, Russian air defences repelled a drone attack on an oil refinery in Tyumen in Western Siberia, Gov. Alexander Moor said Saturday. He said that there was no damage to the refinery and staff members were evacuated.

Ukraine has repeatedly targeted Russian oil facilities, aiming to cut Moscow’s revenue for the war and make Russians feel the consequences of the invasion. Some areas have reported fuel shortages.

In one of the biggest drone attacks since Russia’s full-scale invasion began on Feb. 24, 2022, Ukraine on Thursday struck a major Moscow oil refinery for a second time in a week, sending huge plumes of black smoke over the capital and disrupting hundreds of flights.

Russia’s Defense Ministry said Saturday that its forces shot down 177 Ukrainian drones during the night. It didn’t say how many reached their targets. Two drones were shot down on approach to Moscow, Mayor Sergei Sobyanin said.