REPORTER: Washington D.C. began its work week with the unimaginable. A shooting rampage inside the U.S. Navy Yard, where police believe at least one gunman killed at least eleven people and wounded several others. President Obama had this response.
PRESIDENT BARACK OBAMA: "We're confronting yet another mass shooting, and today it happened on a military installation in our nation's captial. It's a shooting that targeted our military and civilian personnel. These are men and women who were going to work, doing their job, protecting all of us."
REPORTER: Washington, D.C. Police Chief Cathy Lanier said one suspected shooter was dead.
WASHINGTON D.C. METROPOLITAN POLICE DEPART CHIEF OF POLICE CATHY LANIER: "Right now we're confirming at least 12 fatalities. We had a few additional folks that were injured. They were not fatally injured."
REPORTER: Earlier, an eyewitness described the harrowing moments the shooting began.
NAVY COMMANDER TIM JIRUS, EYEWITNESS: "There was an individual who came from the building behind us. He came up and was talking to me and basically saying there's a shooter in your building, then I heard two more shots one of them hit him, he went down in front of me. He was shot in the head, and it did not look like he made it, so I ran from there."
REPORTER: Officials had no immediate motive for the shooting.
A shooting is an occasion when someone is killed or injured by being shot with a gun.