Two students have been killed and three others injured by a gunman who opened fire at a secondary school in California, officials say.

The shooting took place at the Saugus High School in Santa Clarita, north of Los Angeles, minutes before the school day was due to begin.

A 16-year-old male suspect, who was also injured, was taken into custody.

Many US schools have implemented active shooter drills in recent years after fatal attacks around the country.

The shooting was first reported at 07:38 local time (15:38 GMT), LA county sheriff Alex Villanueva told a press conference. "Within seconds we received multiple [emergency] calls," he said, adding that the first police units had arrived at the scene within two minutes.

BBC