SHANGHAI (REUTERS) - Tesla has halted most of its production at its Shanghai plant due to problems securing parts for its electric vehicles (EVs), according to an internal memo seen by Reuters, the latest in a series of difficulties for the factory.

The plant plans to manufacture fewer than 200 vehicles on Tuesday (May 10), according to the memo, far less than the roughly 1,200 units it has been building each day since shortly after it reopened on April 19 following a 22-day closure.

Two sources familiar with the matter had earlier said supply issues had forced the factory to halt production on Monday.

Shanghai is in its sixth week of an intensifying Covid-19 lockdown that has tested the ability of manufacturers to operate amid hard restrictions on the movement of people and materials.

Tesla had planned as late as last week to increase output to pre-lockdown levels by next week.

It was not immediately clear when the current supply issues could be resolved, said the people.

Tesla did not immediately respond to a request for comment.

The China Passenger Car Association is scheduled to release April sales for Tesla, China’s second-largest EV maker behind BYD, on Tuesday.

Another auto association said last week it estimated that overall auto sales in China dropped 48 per cent in April as zero-Covid-19 lockdowns shut factories, limited traffic to showrooms and put the brakes on spending.

Aptiv, Tesla’s main supplier of wire harnesses, stopped shipping from a Shanghai plant that supplies Tesla and General Motors after Covid-19 infections were found among its workers, two people familiar with the matter told Reuters on Monday.

Tesla’s Shanghai plant, also known as the Gigafactory 3, produces the Model 3 sedan and Model Y crossover for the China market and for export.

Tesla partially resumed production at the Shanghai plant on April 19, and had been aiming to increase output at its Shanghai plant to 2,600 cars a day from May 16, Reuters reported previously.

The Shanghai authorities have tightened a citywide lockdown imposed more than a month ago on the commercial hub with a population of 25 million, a move that could extend curbs on movement through the month.