UPDATE (3:10 p.m. ET): The death toll is up to two victims, and the shooter is still apparently alive.
UPDATE (2:10 p.m. ET): One victim has died as well.
UPDATE (12:40 p.m. ET): The gunman, a 15-year-old boy, has reportedly been killed -- though other sources say he's in "grave condition." The injury toll has gone back up to six, with three in critical condition.
At least three people have been shot at a school in California. Early reports suggested that there were six victims.
There's no word on any fatalities at Saugus High School in Santa Clarita. Authorities say the shooter is an Asian male wearing black clothing, and he's apparently still on the loose. (NBC 4 Los Angeles)