(NEWSER) – Specialist Ivan Lopez fired at least 35 shots during his 8-minute rampage at Fort Hood military base, killing three of his fellow soldiers and wounding 16, military investigators say in a detailed account of the shooting. The military has also confirmed that the shooting began after Lopez had an argument at his unit's administrative office over a leave request to deal with family matters, the New York Times reports. He returned with a gun minutes later and killed one person in the office and wounded nine others. Investigators believed the soldier killed in the office had been involved in the leave argument.

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