At least 2 dead after California school shooting

The 16-year-old male suspect was taken into custody and was hospitalized in "grave condition" from a self-inflicted gunshot wound, authorities said.
4:25 | 11/15/19

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Transcript for At least 2 dead after California school shooting
on a very busy Thursday night. We begin with the news that broke again today, a deadly school shooting. This time police say a student on his 16th birthday opening fair on fellow students in Santa Clarita, California, north of Los Angeles. At least two dead tonight. Authorities say the teen gunman opened fire at saugus high school in what's called zero period before classes began. Students brought out in long lined by heavily armed police. The text messages so many sent while hiding. The suspect who police say shot himself is mow in custody and news tonight on the students who did in the survive. Matt Gutman leads us off from the scene. Reporter: It was just before 8:00 A.M. This morning at this school north of the Los Angeles when authorities say a teen walked up with a backpack and started opening fire. We've got an active shooter, saugus high school. We need all units to respond. Reporter: Dozens of cruisers and swat teams racing to the saugus high school. Male Asian wearing black hat and blue jeans. Reporter: Students were congregating in the quad, right near the entrance, when the alleged gunman, also a student, approached and opened fire. Detectives reviewed the video at the scene, which clearly show the subject in the quad withdraw a handgun from his backpack, shoot and wound five people, and then shoot himself in the head. Reporter: Killing a 14-year-old boy and a 16-year-old girl, and officials say today was the suspect's 16th birthday. I have one down inside the office, and I need paramedics right now. Reporter: First responders racing the wounded to ambulances. Some of the 2,000 students there barricading rooms with chairs. Others running for their lives. We heard what sounded like binders happen, because that Or birthday balloon popping. Especially by the library where everything echoes, but then there was still something in our gut that told us that it was wrong. That doesn't sound exactly like a balloon. So everyone went quiet and then we heard two more and that's when -- We all realized something is wrong. This is not normal. And then another pause and three more and we just ran. I just yelled at my teacher, I said we just got to lock the doors right now. Reporter: 17-year-old Hayden Trowbridge's parents had been preparing him for this since he 4 years old, he said. I did have my water bottle just in case, it's like a deadly weapon. Reporter: Choir teacher Kaitlin holt was just feet away from the quad. I had another student hold we laid her down. She was responsive. Reporter: K-9 units checking abandoned backpacks for possible additional weapons or devices. Hundreds of students led out with heavy security, some with their hands in the air. You can see how many fire crews and rescue crews and police officers are behind me. Dozens and dozens here including S.W.A.T. Teams at the school. Parents and others just standing by waiting to pick up the last of the kids. My daughter texted me, I love you mom. I hope I get to see you again. So, yeah, it was heartbreaking. Amidst the swarm of rescuers and journalists were parents, hands on mouths, faces streaked with tears. My hands were shaking. I was crying. I didn't know what to say. I didn't know what to do. Do I go to work? Do I turn around? Reporter: Waiting for what seemed like an eternity for news and for those embraces. As parents, you go to work every day to provide for these kids, and the last thing you want to hear is they've taken a bullet. They're just kids trying to get an education. Reporter: In the aftermath, outside the suspect's house, police taking up positions. Guns drawn, peering through the window with automatic weapons. Parents hug their children yet again. Matt Gutman joining us life from the scene. What do we know about the alleged shooter? Reporter: He's in the hospital, David in critical condition. We are told by law enforcement sources he was a troubled young man. His father died of a heart attack two years ago. They are interviewing his mother and ex girlfriend. Apparently G.O.A.T. Are cooperating. Investigators are also looking into at least one online post from the suspect in which he seemed to suggest something would happen today at school. David? Matt Gutman leading us off tonight.

This transcript has been automatically generated and may not be 100% accurate.

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