Ukrainian drones struck a Siberian oil refinery in a fresh wave of strikes Saturday, as Kazakhstan's president told Russia's Vladimir Putin the Ukraine war should end during a forum in Siberia's Omsk. Moscow said Ukraine -- which has intensified its retaliatory strikes -- launched more than 300 drones into Russia Saturday, including on far-flung regions. - 'Young people are dying' -In Siberia's Omsk hours after the strikes, Kazakh leader Kassym-Jomart Tokayev told Putin the Ukraine war should end as the pair met for a Russia-Kazakh summit. - Urals, Siberia hit -Far from the battlefield, Ukrainian drones disrupted an all-Russian athletics competition in the Urals city of Yekaterinburg. Ukrainian drones have caused nationwide fuel shortages and disrupted ordinary life in Russia more than at any point during more than four years of war.