Key developments on June 21: Ukraine attacks 4 refineries, Shahed drone storage sites in Russia, military saysRussia attacking Chasiv Yar from Toretsk direction, military saysMedia: South Korea’s level of arms supplies to Ukraine will depend on Russia’s actions, official saysRussian guided bomb attack on Donetsk Oblast town kills 2, injures 33 people arrested in Germany for allegedly spying on person from UkraineUkrainian drones attacked four refineries in Russia’s Krasnodar Krai and Astrakhan Oblast, as well as sites where Russian Shahed-type drones are stored overnight on June 21, Ukraine’s …