A tragic mass shooting has left at least 12 people dead and several wounded in the Navy Yard in Washington D.C.
Aaron Alexis, 34, opened fire Monday morning, attacking office workers at a heavily guarded military facility.
According to the Washington Post, Washington Metropolitan Police Chief Cathy Lanier confirmed Alexis’ death.
While no motive is known, President Obama expressed a desire for justice for the shooters. According to Fox News Latino, he promised to make sure "whoever carried out this cowardly act is held responsible."
Although details have not been released, Obama expressed sympathy for the families and honored the victims.
"These are men and women who were going to work doing their jobs and protecting us all," he said, "They're patriots."
The Washington Post reports that Aaron Alexis, 34, of Fort Worth, Texas, has been identified as the lone shooter in the Navy Yard tragedy.
He formerly served as a member of the Navy Reserves. According to the Post, he was cited at least eight times during his Navy career for infractions including insubordination, disorderly conduct, and multiple excessive absences from work. However, Alexis was discharged honorably in early 2011.
The gunman had been hired as a private contractor to do work for the Navy Yard, and possessed security clearance and a valid identification card. Navy officials say they do not know if he was ever treated for mental illness.
Alexis was killed in a shoot-out with police. No motive is yet known.