SpaceX President and COO Gwynne Shotwell defended Elon Musk in an email to employees last week, responding to sexual misconduct allegations directed at the CEO, CNBC has learned.

“Personally, I believe the allegations to be false; not because I work for Elon, but because I have worked closely with him for 20 years and never seen nor heard anything resembling these allegations,” Shotwell wrote in a companywide email sent on Friday and seen by CNBC.

Musk has denied the allegations, which claim he propositioned a flight attendant on one of SpaceX’s private jets in 2016, calling them “wild accusations.”

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In a response to Business Insider, which reported the allegations and that the flight attendant was paid $250,000 severance after confronting the company, Musk said there is “a lot more to this story,” describing it as a “politically motivated hit piece.” Neither Musk nor SpaceX’s vice president of the legal department, Christopher Cardaci, denied the payment in statements to Business Insider.

Read more: CNBC