Four marines killed in accident at US Camp Pendleton were clearing explosives from firing range

Four marines were killed on a US base during a routine maintenance operation. The group were clearing the firing range at Camp Pendleton, California, of unexploded ordnance when they were killed, CBS reports. Marine Corps have confirmed investigators are currently establishing the cause of the accident.

http://www.dailymail.co.uk/news/article-2507059/Four-marines-killed-accident-US-Camp-Pendleton-clearing-explosives-firing-range.html