美国首都华盛顿当局说，在美国一个海军设施星期一发生的枪击案中，为一家军事承包商工作的一名信息技术人员是唯一的嫌疑人。枪击事件造成包括枪手在内的13人死亡。

事件过后几小时，华盛顿警察局长拉尼尔对记者说，嫌疑人是现年34岁的阿伦·亚历克西斯，他家住德克萨斯州沃斯堡，没有证据显示还有第二名嫌疑人。亚历克西斯开始行凶后不久与警察展开枪战，被警察击毙。

警方说，亚历克西斯凭一个有效身份证进入位于华盛顿的美国海军设施，当时他携带着一支军用自动步枪、一支霰弹枪和一把手枪，在海军海上系统指挥部内开枪。海上系统指挥部负责采购、修建和维护舰只和潜艇。大约3千人在那座建筑中工作，其中很多不是军人。

亚历克西斯出生于纽约，从2007年至2011年是美国海军预备役军人。媒体报道说，亚历克西斯曾两次因枪击事件被逮捕，一次是2004年在西雅图，另一次是2010年在沃斯堡。有人说，亚历克西斯性情暴躁。

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.