What should be done if a traffic accident causes 3 deaths? If three people are killed in a traffic accident, they shall immediately report to the traffic management department of the public security organ at the next higher level, and report to the local people's government through the public security organ. According to Article 11 of the Regulations on Procedures for Handling Road Traffic Accidents, the traffic management department of the public security organ shall immediately send traffic police to the scene according to the regulations after receiving the road traffic accident alarm or alarm instructions. If there are casualties or other emergencies, the relevant departments of first aid, medical treatment and fire control shall be notified in a timely manner. In case of an accident involving three or more deaths or other road traffic accidents with significant impact, the accident shall be immediately reported to the traffic management department of the public security organ at the next higher level and reported to the local people's government through the public security organ to which it belongs; If it involves operating vehicles, the relevant administrative departments of the local people's government shall be notified; If explosives, inflammable and explosive chemicals, toxic, radioactive, corrosive, infectious disease source and other dangerous goods are involved, they shall immediately report to the local people's government through the public security organ to which they belong, and notify the relevant departments to deal with them in a timely manner; If damage is caused to roads, power supply, communication and other facilities, the relevant departments shall be notified for timely handling. Then let's extend this question: according to Article 24 of the Regulations on Road Traffic Accident Handling Procedures, the traffic police should, in accordance with the provisions of relevant laws and standards, take photos of the scene, draw a scene map, extract traces and physical evidence, and make a record of the scene investigation. In case of a road traffic accident in which three or more people are killed at one time, the scene camera shall be taken. The scene map and the record of the scene investigation shall be signed by the traffic police, the parties concerned or the witnesses who participated in the investigation. If the party concerned or the witness refuses to sign or is unable to sign, and there is no witness, it shall be recorded. The above content is the lawyer's answer on how to deal with the three deaths caused by traffic accidents. I hope it will be helpful to you.