Electric-car maker Tesla Inc will permanently shut its office in San Mateo, California, and will lay off 229 data annotation employees, a filing showed on Tuesday. Most of the of the workers were in moderately low-skilled, low-wage jobs, such as Autopilot data labeling, which involves determining if Tesla's algorithm identified an object well or poorly, according to one source.

Tesla Chief Executive Officer Elon Musk last month told top managers he had a "super bad feeling" about the economy and that the company needed to cut staff by about 10%.