The explosion happened about 1 p.m.in a primer manufacturing building.
According to the US Army, an explosion at an ammunition plant near Kansas City, Missouri has left one employee dead and four others injured.
A worker who died during an explosion at an ammunition plant in Missouri has been identified as a 55-year-old man from suburban Kansas City. All four injured employees were evaluated at the scene and they refused further medical treatment. The statement said the area has been secured and that the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) had rendered the area safe. It also operates the North Atlantic Treaty Organisation test center.
Lake City Ammunition Plant is a USA government-owned facility that manufactures and tests small caliber ammunition for the Army and operates for the North Atlantic Treaty Organization (NATO). But he says OSHA investigators are heading to the scene.
The 77-year-old plant sits on almost 4,000 acres and is the first of a dozen Army small-arms factories.
LCAAP is housed on 3,935 acres with 408 buildings, 43 magazines, nine warehouses, 11 igloos and storage capacity of 707,000 square feet.
Orbital ATK has received orders worth $92 million from the US Army to manufacture small-calibre ammunition, the company announced on 10 April. Government staff there include 29 Army civilians and for-contract oversight.
A spokesperson told the AP that no more information was immediately available.
When the 2011 explosion occurred at the plant, injuring six people, Alliant Techsystems, or ATK, was the contractor operating the facility.