An explosion Tuesday at a sprawling ammunition plant near Kansas City, Missouri, killed one worker and injured four others, the U.S. Army said.
The blast at the Lake City Army Ammunition Plant in Independence, just east of Kansas City, occurred in a building where chemicals are mixed, Army officials. The building has been secured and rendered safe, they said, allowing investigators to begin looking into what caused the explosion.
Other explosions have occurred at the plant, including a 1990 blast that killed one worker and a 1981 explosion that severely burned a worker who later died, according to records. In 2011, six people were injured in a blast there.