France, April 18 -- French Prime Minister Gabriel Attal has called attention to youth violence on his 100th day in office, laying plans for a "jolt of authority" in the face of what he says is increasing disregard by teenagers.

Attal marked his 100th day as PM with a speech in Viry-Chatillon, the southern Paris suburb where a 15-year-old boy was beaten to death two weeks ago outside his middle school.

It was the latest in a series of attacks on schoolchildren by their peers.

"What is needed is a jolt of authority. We are ready to give it," Attal said, accompanied by Education Minister Nicole Belloubet and Justice Minister Eric Dupond-Moretti.

Common rules were too often defied by a minority of adolescents, Attal added as he repeated a...