Shooting

UPDATE 2:30 p.m. EST: NBC is reporting that one TSA agent was killed and three others wounded. Airport police shot and may have killed the gunman at the scene. The shooter, whose identity has not been confirmed, was taken into custody after being shot.

At a middle school in Sparks, Nevada, on Monday morning, a student shot and killed a teacher, then shot himself in the head fatally, according to early police reports.

UPDATE 6:30 P.M. EST: Officials have confirmed that the woman who led police on a car chase from the White House toward the Capitol was indeed killed at the scene. Her name has not yet been released.

The FBI has released footage of Aaron Alexis at the Washington Navy Yard on the day of his killing spree last week.