Poland school knife attacks linked to internet challenge; second incident in two days

A 15-year-old former student killed a caregiver and injured two others at a school in Leszczydol-Nowiny, northeast of Warsaw, the second knife attack in two days. Polish authorities suspect both incidents are linked to an internet challenge, though details remain unconfirmed. This marks a novel pattern of copycat violence in Polish schools, raising concerns about contagion and public safety.