KYIV, Ukraine (AP) — Russian President Vladimir Putin says Moscow’s offensive on Ukraine’s Kharkiv aims to create a buffer zone but that there are no plans to capture the city. Meanwhile, Ukraine says it will allow prisoners to join the army’s depleted ranks. Putin has said in China that Moscow has launched attacks in the Kharkiv region, in response to the Ukrainian shelling of Russia’s Belgorod region. Russian authorities say a massive Ukrainian drone attack on Crimea has caused power cutoffs in the city of Sevastopol and set a refinery ablaze in southern Russia. Friday’s drone raids marked Kyiv’s attempt to strike back during Russia’s offensive in northeastern Ukraine.