Tesla Motors Inc. has confirmed that two of its top manufacturing chiefs are leaving the company as it readies itself for production of the Model 3.

Josh Ensign, vice president of manufacturing, is leaving immediately while Greg Reichow, the vice president of production, is remaining with Tesla until his replacement is appointed.

Tesla has denied that the executive changes are related to production issues with its Model X SUV, indicating that Reichow is taking a leave of absence. However, an unauthorized source familiar with the situation indicated that the departures are directly connected to delays, glitches and a recall of the Model X.

So far this year, five Tesla vice presidents have left the company, including Michael Zanoni, vice president of finance and world controller, James Chen, vice president of regulatory affairs and deputy general counsel and Ricardo Reyes, vice president of global communications.