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A concerned woman talks on the phone Friday, May 11, 2018, outside Highland High School in Palmdale as deputies search the school.

Police descended on Highland High School after dozens of 911 calls and some reports that there were hostages in the campus library, Los Angeles County Sheriff Jim McDonnell said.

Summary: A 14-year-old in Palmdale, California was arrested for shooting another classmate on Friday.

Sheriff's deputies also headed to a second school, Manzanita Elementary School, a few miles away after receiving reports around 7:30 a.m. that people thought they heard gunfire, Boese said.

Faculty also provided surveillance video of the suspect arriving and leaving the school, which "assisted in the quick apprehension" of the suspect, McDonnell said. Authorities said the victim is a 15-year-old boy who was shot through the forearm and transported himself to a local medical center. A 14-year-old male student was taken into custody during a massive law enforcement response following the campus shooting that left one student with a gunshot to the arm.

"They said there was a shooter", Mr Root said. Deputies searched the scene and found the report to be unfounded.

McDonnell said the boy's mother had called the officer earlier in the morning to tell him she and her husband were having trouble with him and that the teen had run away. "Thankfully we only had one child that was shot". "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". A shooting at the school, she said, has "actually been one of my biggest fears".

Authorities placed both the high school and the elementary school on lockdown.

The Bureau of Alcohol, Tobacco, Firearms and Explosives said it was responding to a shooting at Highland High School, according to its official Twitter account. Two other students were grazed by bullets. Los Angeles police told CNN that they had responded to reports of a man with a gun on the campus.

The deadliest school shooting this year was on February 14, when a former student killed 17 students and staff at Marjory Stoneman Douglas High School in Parkland, Florida.