俄罗斯，突发！已有数十人伤亡

Group 1 - A bridge collapse in Bryansk, Russia, on May 31 led to a passenger train derailing, resulting in at least 7 fatalities and 30 injuries [1][3] - Reports indicate that unidentified individuals placed four explosive devices on the bridge, which were detonated as the train passed [2][3] - The Moscow Railway Company attributed the incident to "illegal interference with transportation activities" [3] Group 2 - The ongoing Russia-Ukraine conflict continues to impact regional stability, with military actions reported in various areas including Sumy and Donetsk [5] - The second round of direct negotiations between Russia and Ukraine is scheduled for June 2 in Istanbul, but significant differences remain regarding key issues [6][7] - The U.S. State Department expressed a desire to avoid prolonged negotiations between Russia and Ukraine, emphasizing the urgency of reaching an agreement [8]