India, May 10 -- Tesla Inc.'s job cuts are escalating in China, according to people familiar with the matter, as Elon Musk contends with growing pressure to win back share in the world's biggest auto market.

Additional layoffs began earlier this week, extending cuts in mid-April that were part of the electric vehicle maker's pledge to slash global headcount by more than 10%, said the people, who asked not to be identified as they're not authorized to disclose the information publicly.

The latest move affects a range of departments including customer service staff, engineers, production line workers, and the logistics team at Tesla's Shanghai plant - home to more than half the company's global production, according to the people. The lay...