乌称俄导弹袭击苏梅州一射击场！鲁比奥：俄将在数日内提出俄乌停火条件！泽连斯基称俄借和谈“拖时间”

Group 1 - The Ukrainian National Guard reported that a Russian missile strike on May 20 targeted a military shooting range in the Sumy region, resulting in 6 military personnel dead and over 10 injured, with investigations currently underway [1] - U.S. Secretary of State Marco Rubio stated that he expects Russia to propose a ceasefire outline within a few days, allowing Washington to assess Moscow's seriousness about achieving peace [3][4] - Rubio indicated that the timeline for the ceasefire proposal was based on a recent two-hour phone call between U.S. President Trump and Russian President Putin, as well as his own discussions with Russian Foreign Minister Lavrov [3] Group 2 - President Trump mentioned that Russia is ready to "immediately" begin negotiations, while Putin expressed caution, stating that Moscow would present a memorandum outlining potential positions for a future peace agreement [4] - Ukrainian President Zelensky accused Russia of not genuinely engaging in negotiations and suggested that Russia aims to prolong the war, as he noted that Putin rejected calls for an immediate and unconditional ceasefire [5] - Zelensky expressed willingness to hear Russia's ideas regarding the proposed memorandum but remained unclear about its specific contents [5]