A 36-year-old man in Uttar Pradesh's Shahjahanpur allegedly killed his four children by slitting their throats before hanging himself. The incident occurred in the village of Manpur Chachari, under the Roza Police Station. The man, Rajiv Kumar, had suffered a head injury in an accident a year ago and was undergoing treatment. His wife had left for her maternal home the previous day. Police are investigating the reason behind the incident.