Tesla Inc Chief Executive Elon Musk said on Monday in an email to staff that an unnamed Tesla employee had conducted “extensive and damaging sabotage” to the company’s operations including allegedly making unspecified code changes to its manufacturing operating system and sending what the email said was sensitive Tesla data to unnamed third parties.

Company spokeswoman Gina Antonini declined to comment on the email.

Musk said in the email, which was seen by Reuters, that he learned about this alleged behavior over the weekend.
“The full extent of his actions are not yet clear, but what he has admitted to so far is pretty bad,” Musk wrote. “His stated motivation is that he wanted a promotion that he did not receive.” Musk did not specify to whom he was referring.

Reuters could not independently confirm any of the claims in the email.