Employees at Tesla's (TSLA) - Get Report flagship plant in Fremont, CA. were injured at an increased rate to the industry average in 2015, and spent about twice as many days away from work than the norm, according to a new report by Worksafe.

Worksafe is a California-based non-profit that works to protect employees from job-related hazards and empower them to advocate for the right to a safe and healthy workplace.

Tesla's Fremont factory had 8.8 injuries per 100 workers in 2015, compared to 6.7 for the auto industry as a whole, according to the report.

While industry-wide stats are not yet available for 2016, Tesla's rate was 8.1 per 100 employees, which Worksafe states is likely to exceed the industry average.

"We may have had some challenges in the past as we were learning how to become a car company, but... with the changes we've made, we now have the lowest injury rate in the industry by far," a Tesla spokesperson said.

Shares of the electric vehicle manufacturer were moving lower during the first hour of trading on Thursday.

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