An elevator carrying around 11 people suddenly plunged from the first floor to the B2 level while its doors were open in eastern China.

The terrifying CCTV footage was filmed at the Asia-Pacific Enterprise Building in Shanghai on June 5.

The incident unfolded as employees, ready to leave for the day, boarded the elevator. As it reached the first floor and the doors began to open, the elevator abruptly dropped, rendering all buttons unresponsive.

The doors slowly closed after the elevator came to a halt at the B2 level, leaving the occupants in a state of shock.

The trapped individuals quickly alerted the building management and called for emergency assistance. Firefighters rushed to the scene, maintaining communication with those inside to keep them calm. Shortly after, building management arrived and coordinated with the firefighters to execute a rescue operation.

Through a swift and organised effort, all trapped passengers were safely evacuated without any injuries. The city's market regulatory authorities soon arrived to investigate the cause of the accident.

Preliminary assessments suggest that the malfunction might have been due to the ageing elevator's occasional brake failure. Despite passing an annual inspection on May 24, the nearly 30-year-old elevator's deterioration was a likely factor.

The Asia-Pacific Enterprise Building, constructed in 1996, stands 18 stories high with two underground levels and five elevators. The faulty freight elevator has been decommissioned, with safety barriers erected around it.

Regulatory authorities are conducting a thorough investigation and will take necessary actions based on their findings.

The video was provided by local media with permission.

近日，上海市徐汇区肇嘉浜路333号的亚太企业大楼发生了一起电梯故障事件，引起社会广泛关注。一部电梯在到达一层时，轿厢门在打开的的情况下突然下坠至B2层，导致十多名乘客被困。

据了解，这起事件发生在6月5日傍晚下班高峰期。当时，有大约11位楼内工作人员进入电梯，准备离开大楼。然而，就在电梯到达一层，门刚打开一刹那，电梯突然发生下坠，所有按钮失效，电梯门也在坠至B2层后才缓慢关闭。

被困人员迅速联系了物业，并在等待物业到场的过程中，拨打了119求助。消防人员迅速赶到现场，与被困人员沟通，稳定他们的情绪。不久后，物业人员也到达现场，与消防人员共同展开救援。

经过紧张而有序的救援工作，被困人员被全部安全救出，所幸无人受伤。随后，市场监管部门也赶到现场，对事故原因展开调查。

据初步判断，这起电梯故障可能是由于电梯老化导致的制动器偶发故障。涉事电梯已经投用近30年，虽然今年5月24日的年检结果为合格，但电梯的老化问题仍然不容忽视。

亚太企业大楼建成于1996年，地上18层，地下2层，共有5部电梯。此次发生故障的货梯已经停运，外围也拦起了警戒线，以确保安全。同时，市场监管部门已介入调查，并将根据调查结果采取相应措施。