SpaceX founder Elon Musk is denying claims that he was involved in sexual misconduct with one of the company’s flight attendants in 2016.

Business Insider reported May 19 that a former SpaceX flight attendant was paid $250,000 by the company as part of a severance agreement that required her to keep quiet about an alleged sexual misconduct incident involving the Tesla CEO.

The report states that the woman was a cabin crew member for SpaceX’s corporate jet fleet in 2016. Per the report, she allegedly “accused Musk, of showing his erect penis, touching her leg and offering her a horse for an erotic treatment.” Business Insider, citing a declaration signed by the friend of the attendant, along with an interview with her.

There are a number of ways to do this. tweets on May 19, Musk slammed the accusations, calling them “wild” and “utterly untrue.”

“But I have a challenge to this liar who claims their friend saw me ‘exposed’ – describe just one thing, anything at all (scars, tattoos, …) that isn’t known by the public,” he tweeted. She won’t be capable of doing so because she has never seen it happen.”