13 Killed, Senate put on partial lockdown after Navy Yard shooting

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The violence led to a chaotic day at the Navy Yard, with dozens of police cars lining blocks of M Street SE outside the Navy base and helicopters circling the site amid fears of a terrorist attack.

Reports varied throughout the day about how many shooters were involved with the killings, with District Chief of Police Cathy Lanier telling reporters at one point that there were two possible other shooting suspects.

Adding to the confusion, the Senate abruptly went into lockdown for more than an hour on Monday afternoon — several hours after the Navy Yard shooting had occurred — in what was described as cautionary move. The House did not go into lockdown.

The FBI said the suspect killed was Aaron Alexis, 34, of Ft. Worth, Texas. He was identified as a former sailor who enlisted in the Navy in 2007 and served until 2011, according to biographical information released by the Navy. He reached the rank of petty officer 3rd class.

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