Deputies detained a 14-year-old boy Friday morning after he allegedly shot another Highland High School student in the arm.
"Deputies responded immediately to Palmdale shooting, arrest made, weapon found, active investigation underway". A rifle was also recovered.
Lydia Gilbert, a junior at Highland, said her mother was dropping her off when a student ran up and warned her there was a shooting. They are not looking for other suspects.
The shooting was sparked by a dispute between the two students, said Capt. Darren Harris with the sheriff's department. The campus was then placed on lockdown and students were told to shelter in place, McDonnell said.
"As I turn another corner I see the kid with the gun", George said. "And I'm locked up in one of the buildings now'".
"I was supposed to be going to school earlier than I was, but was late", she said. He fled to the teachers' lounge. The campuses were searched and no incidents of concern were reported, the superintendent later said.
Gunshots were first reported at Highland High School in Palmdale, north of Los Angeles, around 7:00 a.m. PT.
The sheriff's office also tweeted that they investigated reports of shots fired near Manzanita Elementary School located about seven miles from Highland High School but the campus and school was clear.
At least three nearby schools - David G. Millen Intermediate, Cottonwood Elementary and Ocotillo Elementary - were on lockdown, employees there said.
Manzanita Elementary is about 17 miles from Highland High. Parents were told to have ID ready to pick up students and must be the students' legal guardians, according to authorities.
Friday's incident comes during a time when gun control and school safety has been a national hot topic since the Parkland shooting on February 14.
Nadine Luke told CNN her 18-year-old daughter called her, screaming, after she heard shots in the school.
Guzman, who is a veteran, said he wasn't too anxious after speaking with the teacher. "Alexander, turn around, turn around, there's an active shooter.' And I didn't really have time to react to that because nearly immediately after that I heard one single gunshot very loud and very close by".