France on High Alert as Teacher Killed in Knife Attack Amid Israel-Hamas War

A teacher was killed and several others were injured in a knife attack at a high school in Arras, northern France. The assailant, a Chechen man, was arrested, and his brother was taken into police custody. The teacher had been previously flagged for signs of radicalization. The attack occurred amidst heightened security in France due to the ongoing Israel-Hamas conflict, with protests and calls for a "day of rage" by Hamas. France has the largest Muslim and Jewish populations in Europe.