Tesla chief executive Elon Musk has accused an employee of carrying out “extensive and damaging sabotage” at the electric carmaker.
In an email to staff, Mr Musk said an unnamed employee made unspecified coding changes to its manufacturing operating system and sent sensitive data to unnamed third parties.
The company did not comment and the allegations have not been verified.
The matter will be investigated, Mr Musk said.
“The full extent of his actions are not yet clear, but what he has admitted so far is pretty bad,” he said in the email.
“His stated motivation is that he wanted a promotion that he did not receive.
“As you know there are a long list of organisations that want Tesla to die,” he added, citing Wall Street short-sellers, oil and gas companies and rival car makers as being among them.