A 37-year-old caretaker was killed and two other staff members injured in a stabbing at a primary school in northeastern Poland on Thursday. The suspect is a 15-year-old former student of the school. Authorities report the attacker may have attempted to film the incident using a camera attached to his helmet. Police are currently investigating a possible connection between the attack and an online challenge. The motive behind the stabbing remains under investigation, with the online challenge being a primary focus. This incident has prompted a police investigation into the details surrounding the attack and the suspect's potential motivations. The northeastern Poland school is now the focus of increased security measures.