Accidents happen, but here’s an unusual one. According to reports from China, a BYD electric taxi was hit by a Nissan GT-R in Shenzhen, China, before catching fire. The cab driver and his two passengers were killed in the accident.

It may have involved a supercar and a taxi, but this fatal accident is less straightforward than the recent Ferrari-taxi crash in Singapore. The 21st Century Business Herald said that the fire was believed to have started from the cab’s battery pack.

The lithium iron phosphate (LiFePO4) battery in question was developed by battery expert BYD, also China’s leading electric vehicle manufacturer. The Shenzhen-based company is partly owned by American billionaire Warren Buffett. Following the incident, BYD shares tumbled in Hong Kong and Shanghai amid concerns about the safety of BYD’s e6 electric car.

This is the second well known accident in China in which an EV caught fire. Last year, an electric taxi made by Chinese automaker Zoyte went up in flames due to a leak in the battery pack. No one was hurt in that incident.