美國當局：華盛頓海軍設施槍擊案嫌疑人是單獨作案

Authorities in Washington, D.C. say an information technology employee working for a military contractor was the lone suspect in Monday's shooting rampage at a U.S. naval facility that left 13 people dead, including the gunman.

Washington Police Chief Cathy Lanier told reporters hours after the tragedy there was no evidence a second person was involved with Aaron Alexis, a 34-year-old resident of ((the southwestern city/state of)) Fort Worth, Texas, who was killed during a gun battle with police shortly after his shooting spree began.

Police say Alexis entered the U.S. Naval Yard in the nation's capitol with a valid identification card, armed with a military-style automatic assault rifle, a shotgun and a handgun, and opened fire inside the Naval Sea Systems Command, which is responsible for buying, building and maintaining ships and submarines. About 3,000 people work in the building, many of them civilians.

The New York City native served in the U.S. Navy as a reserve sailor from 2007 to 2011. News outlets say Alexis was arrested in two separate shooting incidents, once in 2004 in Seattle and the second in Fort Worth in 2010. He has been described as having problems controlling his anger.美國首都華盛頓當局說，在美國一個海軍設施星期一發生的槍擊案中，爲一家軍事承包商工作的一名信息技術人員是唯一的嫌疑人。槍擊事件造成包括槍手在內的13人死亡。

事件過後幾小時，華盛頓警察局長拉尼爾對記者說，嫌疑人是現年34歲的阿倫•亞歷克西斯，他家住德克薩斯州沃斯堡，沒有證據顯示還有第二名嫌疑人。亞歷克西斯開始行兇後不久與警察展開槍戰，被警察擊斃。

警方說，亞歷克西斯憑一個有效身份證進入位於華盛頓的美國海軍設施，當時他攜帶着一支軍用自動步槍、一支霰彈槍和一把手槍，在海軍海上系統指揮部內開槍。海上系統指揮部負責採購、修建和維護艦隻和潛艇。大約3千人在那座建築中工作，其中很多不是軍人。

亞歷克西斯出生於紐約，從2007年至2011年是美國海軍預備役軍人。媒體報道說，亞歷克西斯曾兩次因槍擊事件被逮捕，一次是2004年在西雅圖，另一次是2010年在沃斯堡。有人說，亞歷克西斯性情暴躁。