(AP) _ D.C. Police Chief Cathy Lanier says authorities believe there was only a lone gunman responsible for the Navy Yard shooting rampage that left 13 people dead. Authorities had earlier said they were searching for a possible second suspect. Mayor Vincent Gray says the 12 shooting victims range in age from 46 to 73 years old. The gunman, identified as 34-year-old Aaron Alexis, was also killed. Gray said at a news conference late Monday night that they are still notifying the families of about half of the 12 people who were killed. The FBI says the gunman used a valid pass to get on to the Navy Yard.
(AP) The Navy says a gunman who opened fire inside a building at the Washington Navy Yard was a full-time reservist from 2007 to 2011.
The Navy said in a release Monday that 34-year-old Aaron Alexis, of Texas, left the Navy on Jan. 31, 2011, as a petty officer 3rd class. It's not immediately clear why he left.
Alexis had been working for the fleet logistics support squadron No. 46, in Fort Worth, Texas. The Navy says his home of record was New York City. Alexis was one of 13 people killed during the rampage.
Senate officials say no one is being allowed in or out of Senate buildings while authorities search for a potential second suspect in the Navy Yard shootings.
1:15 PM UPDATE
(AP) D.C. Police Chief Cathy Lanier said during a news conference Monday that 12 people were confirmed dead in the shootings at the Washington Navy Yard.
Lanier says people are being told to stay in their homes and out of the area as authorities search for two other possible suspects. One of the shooters has died.
The police chief says officers are searching for two other people with firearms wearing military-style uniforms. She says there is no indication of a possible motive at this time.
11:15 AM UPDATE
WASHINGTON (AP) Two Navy officials say at least six people have died in a shooting at the Washington Navy Yard.
The officials spoke on condition of anonymity on Monday because they were not authorized to discuss the situation publicly.
A Defense Department official and a federal law enforcement official have said a shooter had died, though it was not immediately clear how.
The Washington DC police chief says their maybe two additional shooters.
As many as 10 were wounded.
11:00 AM UPDATE
WASHINGTON (AP) Officials say at least one shooter has died at the Washington Navy Yard, where several people were killed and as many as 10 were wounded.
A federal law enforcement official and a Defense Department official said Monday morning that a shooter had died. Both spoke on condition of anonymity because they were not authorized to discuss the ongoing investigation.
Two other officials have said they are looking into the possibility of a second shooter at the Navy Yard.
10:00 AM UPDATE
WASHINGTON (AP) Officials: Police looking into possibility of second shooter at Navy Yard where several killed.
WASHINGTON (AP) A Defense Department official says several people have been killed and as many as 10 have been wounded in a shooting at the Washington Navy Yard.
The official spoke on condition of anonymity Monday because the official was not authorized to discuss the matter publicly.
The official also says the shooter is ``contained'' but not yet in custody.
Earlier in the day, the U.S. Navy said it was searching for an active shooter at the Naval Sea Systems Command headquarters, where about 3,000 people work.
The exact number of people killed and the conditions of those wounded was not immediately known.
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