At least three students have been shot at Gardena high school in Los Angeles county and the school is on lockdown, KTLA reports.
At least one of the injured has been taken to a hospital, but the condition of the victims remain unclear.
KTLA says the suspect is 18 years old and is believed to be a student. KTLA says police have identified the shooter, but have not released the name.
Update at 2:25 p.m. ET: KTLA reports that two students, a girl and a boy, were wounded in the shooting. The victims were taken from the school by ambulance, KTLA says.
The condition of the victims remains unclear.
CNN reports that police have identified the suspect, but have not released the person's name. The person is described as dressed in black.
Earlier posting: CNN reports that three people have been shot at California's Gardena high school. It says the school is currently on lockdown.
Gardena, with a population of around 57,000, is located in Los Angeles county.
Update at 2:21 a.m. ET: The Los Angeles Times reports that as of 2:13 p.m. ET the gunman was still at large.