Tesla Inc. has notified employees it will temporarily halt production of the Model 3 and Model Y. The pause will supposedly last from Feb. 22nd to March 7th, but the cause is still unknown.

Citing unnamed sources, Bloomberg broke the news out of Tesla’s Fremont, California assembly plant. The report states Model 3 assembly line workers were told the line would idle for a week or so. No reasoning for the temporary pause has been disclosed to employees.

Last month Tesla did disclose the possibility its production could be impacted by a global shortage of semi-conductors. This shortage has already impacted just about every automaker in the world, including domestic automakers here in the U.S. Semi-conductors are used in a variety of electronic parts on every new vehicle.

Since Tesla no longer has a communications department, it’s unclear if the automaker will disclose the reasoning for the production pause.