It added that “according to analysis of the situation on the ground, we can provisionally confirm that it is an accident (not due to vehicle-related reasons).”
Nio also said he was cooperating with a police investigation into the cause of the accident.
The company did not respond to a request for additional comment from CNN Business.
Founded by Chinese entrepreneur William Li in 2014, Nio has become one of the fastest-growing electric car start-ups in China and one of many homegrown rivals to Elon Musk’s Tesla.
Last year, according to the company, it delivered 91,429 vehicles, 109% more than in 2020. In the first five months of this year, it delivered 37,866 units, an increase of 12% from the same period a year ago.
Nio listed its shares on the New York Stock Exchange in 2018.