KYIV, Ukraine (AP) — Russian attacks killed four people across Ukraine, officials said on Saturday, as the aerial war between Moscow and Kyiv intensifies.

Russia has struck Ukraine with cruise and ballistic missiles, glide bombs and jet-powered drones while front-line progress has slowed, some 4½-years after Moscow launched a full-scale invasion of its neighbor.

“It is essential that our partners not forget: Russia is escalating every single day. If the Russians have chosen to make their strikes even more brutal, the world must choose stronger responses to keep the war from spreading further,” Ukrainian President Volodymyr Zelenskyy wrote on Saturday.

He listed “numerous strikes on residential homes” in the cities of Kyiv and Zaporizhzhia, and the Odesa, Sumy, and Kharkiv regions.

Two women in Zaporizhzhia died when they were trapped beneath the rubble of their home, Zaporizhzhia’s regional military administration said. A separate Russian attack on the city of Sumy also killed two people, local officials said.

Drones target Russian refineries

Separately, Ukraine continued to target Russian oil refineries and industrial sites with long-range drones. A Ukrainian drone attack in Russia’s southern Krasnodar region killed three people and wounded two, local officials said Saturday.

Regional Gov. Veniamin Kondratyev said in a post on Telegram that the attack sparked fires at two industrial sites but provided no further details. Russian media later reported that an oil refinery had been targeted.

Ukrainian attacks also killed three people overnight in the Russian-occupied part of Ukraine’s Zaporizhzhia region, Moscow-installed regional head Yevgeny Balitsky said Saturday, according to Russian state media.

Earlier this week, Zelenskyy appealed at the United Nations for countries to deprive Russia of revenue through sanctions and trade restrictions, denying Moscow the money it needs to prolong the war. Despite years of diplomatic efforts, however, there has been no breakthrough toward ending the conflict.

Russian attacks spark fires in Kyiv

Elsewhere in Ukraine, two people were injured overnight in the Kyiv region after a Russian drone strike sparked a fire at a warehouse in the Boryspil district. Russian drones also struck several districts of the capital, injuring four people and damaging residential and office buildings, officials said.

Russia’s Defense Ministry said Saturday that the attack on Kyiv damaged a data center supporting mobile internet services and Starlink satellite communications.

___

Follow the AP’s coverage of the war in Ukraine at https://apnews.com/hub/russia-ukraine