A former Olympic snowboarder has accused U.S. snowboarding coach Peter Foley of sexual misconduct and inappropriate behavior in a series of Instagram posts.

Callan Chythlook-Sifsof, who competed in the 2010 Winter Olympics, said in one post that Foley had "taken naked photos of female athletes for over a decade.” She also said that her original posts about Foley had been taken down by the social media site earlier this week for "bullying.”

Foley, who is currently in Beijing for the Winter Olympics and sits on the Snowboarding Executive Committee for the U.S. Olympic team, pushed back against the claims of misconduct on Saturday. In a text to the Associated Press, Foley said he was surprised by the allegations and denied them.