Two trains collided, leaving hundreds injured in snowy tragedy in northern China.

The video was filmed in Beijing on December 14.

Eyewitnesses recount the terrifying moment as one passenger, seated in the detached carriage, heard a thunderous crash, causing standing commuters to tumble, filling the cabin with screams.

Promptly responding to the crisis, key leaders from the Municipal Party Committee and Government rushed to the scene, orchestrating operations and establishing an on-site accident response leadership team. Swift reactions from transportation, fire, health, public security, and emergency services, alongside local governments, were instrumental in rescue efforts.

As of 23:00 on the 14th, the evacuation and rescue operations were largely concluded. A total of 515 individuals were transported to hospitals for examination, with 102 sustaining fractures. Thankfully, no fatalities were reported. By 6:00 the following morning, 423 had been discharged, 25 were under observation, and 67 remained hospitalized.

Preliminary investigations point to slippery tracks due to snow, causing a downgrade in the signal of the front train. Emergency braking led to a halt, but the rear train, positioned on a downhill slope, slid uncontrollably in the snowy conditions, resulting in the collision.

A dedicated investigation team has been formed by the municipal government to thoroughly examine the incident, assess emergency response procedures, draw vital lessons from the accident, hold those responsible accountable, and ensure effective corrective measures are implemented.

The video was provided by local media with permission.

12月14日18时57分，北京地铁昌平线，西二旗站 至 生命科学园站 上行区段，两辆列车发生追尾事故，造成部分乘客受伤。
据现场一位乘客介绍，当时自己在后面那节脱节的车厢上，事发时他坐在座位上，突然听到一声巨响，站立的人集体摔倒，车厢里满是人们的叫喊声。
事故发生后，市委市政府主要领导立即赶赴现场，指挥调度，成立现场事故处置领导小组，交通、消防、卫健、公安、应急等部门和属地政府迅速响应，全力以赴抢险救援，转运伤员，转移乘客。14日23时许，人员转运完毕，现场处置工作基本结束，共有515人送医院检查，其中骨折102人，无人员死亡。截至今晨6时，423人已离院，25人留观，67人住院治疗。
据初步调查，事故原因为雪天轨滑导致前车信号降级，紧急制动停车，后车因所在区段位于下坡地段，雪天导致列车滑行，未能有效制动，造成与前车追尾。
目前，市政府已成立地铁昌平线事故调查组，将进一步查清事故原因，评估应急处置工作，深刻吸取事故教训，严肃追究责任，切实抓好整改。