Marines: Human Error Caused Deadly Nevada Mortar Explosion

Seven were killed in training accident

A military investigation has determined human error was to blame for a March mortar explosion that killed seven U.S. Marines in Nevada.

1st Lt. Oliver David, a spokesman at Camp Lejeune in North Carolina, said in a press release Wednesday that a Marine operating a 60 mm mortar tube and ammunition "did not follow correct procedures, resulting in the detonation of a high explosive round at the mortar position."

The Marines did not release a copy of the investigative report and declined to provide any further details about the nature of the deadly mistake. Officials also would not say whether changes to training procedures were enacted as a result of the review.