Tesla Inc. will begin around-the-clock production at its Fremont, Calif., assembly plant as it tries to ramp up Model 3 output to 6,000 a week by the end of June, according to an internal company email.

“As part of the drive towards 6k, all Model 3 production at Fremont will move to 24/7 operations. This means that we will be adding another shift to general assembly, body and paint,” Tesla CEO Elon Musk wrote in the email obtained by Electrek.

The news comes a day after Tesla temporarily suspended Model 3 output in what the company said was a planned production pause.

The suspension of output — the second since February — was meant to improve automation and systematically address bottlenecks to increase production, a regular move by car companies, Tesla said on Monday.

"We will be stopping for three to five days to do a comprehensive set of upgrades. This should set us up for Model 3 production of 3,000 to 4,000 per week next month," Tesla CEO Elon Musk said in a letter to employees, Electrek reported Tuesday.

"Another set of upgrades starting in late May should be enough to unlock production capacity of 6,000 Model 3 vehicles per week by the end of June," Musk added in the letter, according to Electrek.

Between the Fremont plant and its battery factory, Tesla will be adding about 400 people per week for several weeks, Musk wrote. The company had previously said it was targeting by around the end of the second quarter.

“The reason that the burst-build target rate is 6,000 and not 5,000 per week in June is that we cannot have a number with no margin for error across thousands of internally and externally produced parts and processes,” Musk said, noting that the carmaker produced 2,250 of the mission-critical sedans last week.

“We are burning the midnight oil to burn the midnight oil,” he added.