Four Arab youths aged 16 and 17 from the town of Jaljulya will be charged Thursday with shooting and killing another youth, Amjad Shahawna of Kafr Kasem, in early October. Police believe the youths opened fire on the school bus that Shahawna was on, killing him.

Investigators said that the attack was meticulously planned. It was motivated, they said, by a previous scuffle between youths, which involved shoving.