Two people were dead after a test car flew out of Chinese electric vehicle maker Nio's Shanghai headquarters and plunged several stories to the ground, local media reports said.
Despite efforts to save them, both passengers were killed in the bizarre accident on Wednesday evening.
The footage of the incident was first reported on Thursday by social media, showing rescue workers trying to get inside a gray car as it lay on its side surrounded by broken glass and other debris.
The vehicle was in a parking lot on the third or fifth floor of the company's headquarters when the accident happened, according to reports.
The cause of the accident was not immediately known, and Nio did not respond to a request for comment.
The delivery of the model is scheduled for the third quarter of this year.
In August, Lin Wenqin, a Chinese entrepreneur in Fujian province, died when his Nio sport utility vehicle crashed with the driver assistance function on, raising concerns about the safety of self-driving vehicles.