Tesla Inc. suspended production at its plant on the outskirts of Shanghai, according to people familiar with the matter, bringing to a halt all of the company’s vehicle manufacturing globally.

The electric-car maker informed factory workers who were supposed to return to work Wednesday, after China’s five-day Labor Day break, that their holiday would be extended and they will return as soon as May 9, according to the the people, who asked not to be identified because the information isn’t public.

The reason for the abrupt