NEW YORK, Aug. 11 (Xinhua) -- An unspecified number of people were trapped under the rubble after an explosion occurred at a U.S. Steel plant near the city of Pittsburgh on Monday, according to media reports. ■
NEW YORK, Aug. 11 (Xinhua) -- An unspecified number of people were trapped under the rubble after an explosion occurred at a U.S. Steel plant near the city of Pittsburgh on Monday, according to media reports. ■
