France raises security level after school knife attack

The French prime minister has put the country on its highest state of counter-terrorism alert after an assailant fatally stabbed a teacher and seriously wounded two others. Witnesses say the knifeman shouted “Allahu Akbar”, or “God is greatest”, during the attack at a school in Arras, northern France. He is now in custody.

The “attack emergency” level has been used in previous counter-terror cases. The alert can trigger extra security deployments and public warnings.