California student shot 2 classmates before shooting himself

The teenager who gunned down two classmates at a California school a week ago before shooting himself utilised a "kit gun" that is untraceable, specialists said Thursday.

In a tweet, Los Angeles County Sheriff Alex Villanueva said the supposed "apparition weapon" utilised by Nathaniel Berhow was gathered from parts that don't have sequential numbers.

He said pack firearms - otherwise called "80 per cent weapons" - are sold at weapon appears or can be acquired web-based, enabling proprietors to skirt California's firearm laws.

Phantom firearms "are sold as a unit, and you can legitimately get it, collect the weapon yourself, and you have a firearm that isn't enrolled, and nobody realises that you have it, it's hazardous," Villanueva said.

The sheriff included an explanation that it was hazy who collected the .45-bore gun utilised by Berhow last Thursday during his frenzy at Saugus High School, a short drive from Los Angeles.

Two individual understudies killed, and a few others harmed before Berhow, who had turned 16 that day, shot himself in the head. He passed on a day later.

Specialists are as yet attempting to sort out what provoked the shooting, mainly as Berhow had no history of grieved conduct.

Villanueva said Berhow's dad had six enlisted weapons that were legitimately expelled from the home and along these lines demolished. A later search turned up the "unit firearm." The sheriff said specialists are taking a gander at Berhow's electronic correspondence in the expectation it will reveal insight into his intention.