美国匹兹堡附近工厂爆炸死亡人数升至2人

Group 1 - The explosion at the U.S. Steel plant in Allegheny County, Pennsylvania, resulted in 2 fatalities and at least 10 injuries [1][2] - The incident occurred on August 11 at approximately 10:51 AM local time, with rescue operations ongoing to locate individuals trapped under the debris [1] - The affected plant is the largest coking facility in North America and employs over a thousand workers [2] Group 2 - The cause of the explosion remains unclear, and the facility has a history of similar incidents, having experienced explosions in 2009 and 2010 that resulted in casualties [2] - The plant has been associated with long-standing pollution issues, raising concerns about safety and environmental impact [2]