Three time world track cycling champion Kelly Catlin has died aged 23.
The US cyclist, who also won an Olympic silver medal, died at her home in California on Friday.
Her father, Mark, said she took her own life, according to VeloNews.
USA Cycling confirmed her death, with president and chief executive Rob DeMartini paying tribute on its official website.
He said: “The US cycling community suffered a devastating loss with the passing of Kelly Catlin.
“We are deeply saddened by Kelly’s passing, and we will all miss her dearly.
“We hope everyone seeks the support they need through the hard days ahead, and please keep the Catlin family in your thoughts.
“Our thoughts and prayers are with the Catlin family. This is an incredibly difficult time and we want to respect their privacy.
“The entire cycling community is mourning this immense loss.”
Ms Catlin was part of three successive world team pursuit triumphs from 2016 to 2018 while she was a runner-up in the same event in the Rio Games three years ago.