An explosion at a U.S. Steel plant near Pittsburgh left one person dead and sent at least 10 to hospitals and heavily damaged the facility, with emergency workers still searching the badly charred rubble for a missing worker,

By Rich McKay and Julia Harte (Reuters) -Multiple explosions at a U.S. Steel plant near Pittsburgh killed at least one person and injured 10 others, authorities said on Monday, and emergency crews were searching through the rubble for an employee believed to be missing.

An explosion at a U.S. Steel plant near Pittsburgh has left dozens wounded and people trapped under the rubble, with emergency workers on site trying to rescue them.