CNN —Ukrainian air defenses withstood Russia’s most intense air attack on Kyiv since the start of the year overnight into Thursday, the capital region’s military chief said. Last night, the aggressor launched another large-scale air strike on the capital,” Serhiy Popko, head of the Kyiv city military administration, wrote on Telegram. Russian air attacks have targeted Kyiv on three days out of the past four, Popko said. Russian oil refinery firesAlso early on Thursday, fires broke out in two oil refineries in southwestern Russia, following separate alleged drone strikes. It is unclear who is responsible for the drone attack.

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