UPDATE: 7:38 p.m.
Seattle, WA - The man identified as the shooter in the Washington Navy Yard slayings had been arrested in Seattle in 2004 for shooting out the tires of a parked car in what he described as an anger-fueled "black out."
Two construction workers building a new home told police that Aaron Alexis walked out of a home next door on May 6, 2004, pulled a pistol from his waistband and fired three shots into the rear tires of their parked car.
Alexis later told police he thought the victims had "disrespected him" and "mocked him" earlier that morning after he discovered that his own vehicle had been tampered with. Alexis also told detectives he didn't remember firing his weapon until about an hour later, according to the police report.
Seattle police said in a statement Monday that detectives later spoke with Alexis' father, who told police Alexis had anger management problems associated with PTSD, and had participated in rescue attempts on Sept. 11th, 2001.
When police interviewed the construction workers and manager in 2004, they told police Alexis had "stared at the construction workers every morning for about 30 days prior to the shooting." The owner of the construction business said he believed Alexis was angry over the parking problem outside the construction site, Seattle police said.
Alexis was booked into King County Jail on June 3, 2004, after making several attempts to find him, police records show.
Court records show he had a hearing and was released on the condition he not have contact with any of the construction workers. A message left for the attorney who represented him at that hearing, Raymond Connell, was not immediately returned.
Seattle police said Monday the case was referred to Seattle Municipal Court for charges of property damage and discharge of a firearm.
There's no record that he was ever prosecuted, and a spokeswoman for the Seattle City Attorney's Office, Kimberly Mills, said Monday that her office never received the report from police so did not review it for possible charges.
According to public documents, Alexis lived in Seattle in 2004 and 2005. He voted in 2004, and received several traffic violations in the Seattle area.
Nobody answered the door Monday afternoon at a home in south Seattle where Alexis lived at the time. The home is near the end of a dead-end street that backs up against Interstate 5, sits under heavy airplane traffic and is across from a park marred by graffiti.
Neighbors said two older women lived in the home. Juan Martinez, 32, lives next door and said he has had brief, friendly encounters with his neighbors but hasn't seen any male relatives at the home or heard of them mentioned. He's lived in the area for five years.
UPDATE: 5:03 p.m.
Washington - President Barack Obama is mourning what he called "yet another mass shooting" in the United States that he says took the life of American patriots.
The death toll has reached 13 from Monday's shootings, according to the D.C. Mayor.
At least one gunman opened fire and is among the dead. He has been identified as Aaron Alexis, 34, from Texas. The FBI released his mugshot Monday evening.
Obama promised to make sure, quote, "whoever carried out this cowardly act is held responsible."
He said several people were shot Monday morning at the Washington Navy Yard about 3 1/2 miles from the White House, and some were killed.
He said the victims were "courageous Americans" who knew about the risks of serving overseas, but wouldn't have expected such "unimaginable violence" at home.
The White House says the president has been receiving frequent briefings about the unfolding situation by senior aides.
UPDATE: 11:44 a.m.
Washington - At least one gunman opened fire inside a building at the Washington Navy Yard on Monday morning, and officials said several people were killed and as many as 10 were wounded, including a law enforcement officer.
The associated press has reported that a shooter has died.
A shooter was earlier "contained" but not yet in custody, according to a Defense Department official, who spoke on condition of anonymity because they were not authorized to discuss the matter publicly. Two other officials -- one with the Defense Department and the other with law enforcement -- said police were looking into the possibility of a second shooter.
Witnesses described a gunman opening fire from the fourth floor, aiming down on people in the first-floor cafeteria. Others said a gunman fired at them in a third-floor hallway.
As witnesses emerged from the building, a helicopter hovered over the building, schools were on lockdown and airplanes at nearby Reagan National Airport were briefly grounded. Less than 2 miles away, security was beefed up at the Capitol, but officials said there was no known threat there.
The exact number of people killed and the conditions of those wounded was not immediately known. About 3,000 people work at the Naval Sea Systems Command headquarters, which builds, buys and maintains the Navy's ships and submarines and combat systems.
Todd Brundidge, an executive assistant with Navy Sea Systems Command, said he and other co-workers encountered a gunman in a long hallway of their building on the third floor. The gunman was wearing all blue, he said.
"He just turned and started firing," Brundidge said.
Terrie Durham, an executive assistant with the same agency, said she also saw the gunman firing toward her and Brundridge.
"He aimed high and missed," she said. "He said nothing. As soon as I realized he was shooting, we just said, 'Get out of the building.'"
Rick Mason, a program management analyst who is a civilian with the U.S. Navy, said a gunman was shooting from a fourth floor overlook in the hallway outside his office. He said the gunman was aiming down at people in the building's cafeteria on the first floor. Mason said he could hear the shots but could not see a gunman.
Shortly after the gunfire, Mason said someone on an overhead speaker told workers to seek shelter and later to head for the gates at the complex.
Patricia Ward, a logistics management specialist, said she was in the cafeteria and heard shots. They sounded like "pop, pop, pop," she said. After a few seconds, there were more shots.
"Everybody just panicked at first," she said. "It was just people running, running, running."
Ward said security officers started directing people out of the building with guns drawn.
Police and federal agents from multiple law enforcement agencies responded. Ambulances were parked outside, streets in the area were closed and departures from Reagan National Airport were temporarily halted for security reasons.
Among the wounded was a D.C. police officer, according to a law enforcement official who spoke on the condition of anonymity because the person was not authorized to discuss an ongoing investigation.
A U.S. Park Police helicopter hovered over the building and appeared to drop a basket with a person onto the roof.
Officials at MedStar Washington Hospital Center said two shooting victims had been brought there.
District of Columbia schools officials said six schools and one administrative building in the vicinity of the Navy Yard were placed on lockdown. The action was taken out an abundance of caution, schools spokeswoman Melissa Salmanowitz said.
Naval Sea Systems Command is the largest of the Navy's five system commands and accounts for a quarter of the Navy's entire budget. It builds, buys and maintains the Navy's ships and submarines and their combat systems.
The Navy Yard is part of a fast-growing neighborhood on the banks of the Anacostia River in southeast Washington, just blocks from Nationals Park and about 1 1/2 miles southeast of the U.S. Capitol.
Washington - 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.
ABC 13's sister station in Washington, WJLA, is reporting that the FAA has lifted its ground stop at Reagan National Airport. Several nearby schools are also on lock down in the area, WJLA reports.
Stay with ABC 13 for further updates.