A CALIFORNIA teenager who killed two classmates and wounded 13 others in a school shooting rampage tearfully apologised as he was jailed for 50 years to life.

An 18-year-old student accused of shooting five people at his high school made a reference to the 1999 massacre at Columbine High in Colorado during class earlier this year and simulated guns with his hands, a classmate said.

A US school is in shock after a pupil shot three children, two teachers and sustained serious injuries himself in a gun battle.

An 18-year-old student has opened fire at his Californian high school, wounding three classmates and two teachers.