A teenage boy gunned down fellow students at a California high school on his 16th birthday Thursday, 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 in the United States that have left around 300 youngsters dead over two decades.