俄罗斯一工厂发生爆炸，4死多伤

Core Points - An explosion occurred at a factory in Chelyabinsk Oblast, Russia, resulting in 4 fatalities and multiple injuries [3] - The incident took place late on October 22, with the roof of the factory collapsing and a subsequent fire igniting [3] - Emergency responders, medical teams, and investigators have arrived at the scene to conduct rescue and investigation operations [3]