A former US Olympic swimmer has accused a former national team coach of sexually abusing her when she was 16.
Ariana Kukors, who represented the United States in the 2012 Olympic Games, said Sean Hutchison, then a coach for USA Swimming's national team, began "grooming" her for a sexual relationship when she was 13.
"I've realised that stories like my own are too important to go unwritten," Kukors, 28, said in a statement.
Hutchison told the New York Times the accusations were not true.
According to the Times, Hutchison said he and Kukors were at one time involved in a "committed relationship."
"At no time did I ever abuse Ariana Kukors or do anything with her that was not consensual," the statement said.
"I absolutely deny having any sexual or romantic relationship with her before she was old enough to legally make those decisions for herself. Prior to that time, I did nothing to 'groom' her."
Kukors said she first met Hutchison through his swimming club, the King Aquatic Club in Washington state.
The club said in a statement the news "broke our collective hearts."
Investigators from the US Department of Homeland Security have searched Hutchison's Seattle home, a department spokeswoman said, describing it as an investigation into "alleged online child exploitation."
It comes as US Olympic officials have been accused of being too slow to react to Larry Nassar, the former USA Gymnastics team doctor who pleaded guilty to sexual abuse last year.
Kukors echoed this complaint.
"Much like the USOC knew about Larry Nassar years before his arrest and did nothing, USA Swimming had notice in 2010 that Sean Hutchison was involved in an inappropriate coach-athlete relationship with Ariana and took no actions to protect her or other swimmers," her lawyer Robert Allard said in a statement.
USA Swimming said in a statement it investigated in 2010 a report that Hutchison and Kukors had a sexual relationship.
Both denied a relationship at the time and the case was closed.
The governing body said it first learned of the allegations of sexual abuse while Kukors was a minor when she went public this week.