#SantaClaritaShooting: 2 Dead, At least 4 Injured In Shooting At A Los Angeles-Area High School; Suspect In Custody.

A teenage boy gunned down fellow students at a California high school on his 16th birthday on Thursday (Nov 14), killing two and wounding another three before turning the pistol on himself.

The gunman was taken into custody in "grave" condition, police said, as officers stormed Saugus High School in Santa Clarita - the latest in a relentless cycle of classroom shootings that have left around 300 youngsters dead over two decades.

The chilling scene played out even as lawmakers in Washington were debating the latest attempt at gun control legislation that has stalled in Congress for months.

Terrified students described barricading themselves into classrooms while others fled as word rapidly spread of the unidentified Asian boy opening fire with a .45 caliber semiautomatic.

"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," homicide captain Kent Wegener told a news conference.

The teen was found among the wounded by first responders, said Los Angeles County Sheriff Alex Villanueva.

No motive has yet been established, but a message reading "Saugus, have fun at school tomorrow" had been posted on "what we believe to be the subject's Instagram account," Wegener confirmed.

It was removed by another person following the incident, he added.

The FBI said there was no sign of an ideological motive, or any co-conspirators.

CNN