According to the local news report and a former Tesla employee, the electric vehicle maker fired about 400 employees last week. The dismissals were a result of a company-wide annual review, Tesla said in an emailed statement, without confirming the number of employees leaving the company. "It's about 400 people ranging from associates to team leaders to supervisors. We don't know how high up it went," said the former employee, who worked on the assembly line and did not want to be identified. Though Tesla cited performance as the reason for the firings, the source told he was fired in spite of never having been given a bad review.