fa تخصصي Special گزارش مورد Case Report <div style="text-align: justify;"><strong>Background</strong>: On May 3, 2017, at 11:58 AM local time, an explosion occurred in the Zemestan-Yurt coal mine in Azadshahr City of Golestan Province, northern Iran, which resulted in mass casualty incident.<br> <strong>Materials and Methods</strong>: In total, more than 126 miners were affected. Of them, 43 miners were killed, 73 other workers who helped their coworkers were also injured and taken to the hospital, and 10 injured people received on-site prehospital medical care. Many defects in the response phase were identified in the scene management and the triage.&nbsp;<br> <strong>Results</strong>: It seems necessary to establish a response plan for mass casualty incident, hold regular education, and plan to prepare involved units for appropriate responses.<br> <strong>Conclusion</strong>: These measures are the first steps needed to improve preparedness and response to a mass casualty incident.&nbsp;&nbsp;</div> Triage, Emergency Medical Services (EMS), Mass Casualty Incident (MCI), Mine Explosion 173 178 http://hdq.uswr.ac.ir/browse.php?a_code=A-10-149-1&slc_lang=fa&sid=1 Ahmad Reza Raeisi Raeisi@mng.mui.ac.ir 0000-0001-8588-4340 No Health Management and Economics Research Center, Isfahan University of Medical Sciences, Isfahan, Iran. Ali Mohajervatan mohajervatanali@yahoo.com 0000-0001-9043-7596 Yes Department of Disaster and Emergency Health, School of management and Medical Information Sciences, Isfahan University of Medical Sciences, Isfahan, Iran. Zahra Mehraein Nazdik z.mehraein@gmail.com No Department of Management, School of Management and Economics, Shahid Bahonar University of Kerman, Kerman, Iran.