A report detailing an accident at Tesla’s Fremont manufacturing facility that resulted in an employee having his leg amputated could raise more eyebrows about the electric carmaker’s safety procedures as it ramps up production of its crucial Model 3 sedan.

According to Bloomberg Businessweek, the incident occurred on November 16, 2016 outside of Tesla’s main Fremont factory building where a Tesla employee heard another working screaming. When that employee went outside, he found a Tesla worker named Robert Limon on the ground, holding his leg and “bleeding like crazy.”

The forklift incident was part of a Bloomberg report that described Tesla efforts to produce its mid-sized Model 3 sedan as “hell for (Chief Executive) Elon Musk.”

Limon said he had been hit by a forklift driven by another Tesla employee who was doing donuts with the vehicle. The Bloomberg report cited unnamed Tesla co-workers of Limon’s as saying he had to have his injured leg amputated.

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Tesla confirmed the forklift accident, which occurred as two employees were fooling around with the vehicle, yet not during any work-related activities. Security officials and paramedics were notified, and the driver of the forklift was fired.

“Nothing is more important to us than the safety of our employees,” a Tesla spokesperson said in a statement given to this news organization. “This is not to say that there aren’t real issues that need to be dealt with at Tesla or that we’ve made no mistakes with any of the 40,000 people who work at our company. However, there should be absolutely no question that we care deeply about the well-being of our employees and that we try our absolute hardest to do the right thing and to fail less often.”

Whether it’s because of Tesla’s upending of the electric car market, CEO Musk’s pronouncements about the company’s production efforts, or other matters, Tesla has come under intense scrutiny regarding the safety of its employees and their working conditions.

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Tesla driver ‘completely reclined’ and apparently asleep at 90 mph, police say In late June, for instance, Tesla said a former executive, Carlos Ramirez, was fired for “bullying,” “inappropriate comments,” and “harassing workplace behavior.” Tesla made the statement in response to a lawsuit filed by Ramirez, who had been hired to audit Tesla’s response to workplace injuries.

The forklift incident took place eight months before Tesla began production work on the Model 3. Last week, Tesla said it had reached its goal of producing 5,000 Model 3 cars a week by the end of June, as it rolled 5,031 Model 3 vehicles off its assembly lines during the last seven days of the month.