Doncaster prop forward Ian Williams has died after he collapsed at training, the English Championship club have announced.
Williams, 27, who joined the Knights from neighbours Rotherham last summer, collapsed during a session at Castle Park and could not be resuscitated.
Williams, an Oxford graduate, made six appearances for his club, who said in a statement: "It is with great sadness that Doncaster RFC announces the passing of prop forward Ian Williams.
"Ian collapsed at training at Castle Park this morning and, despite the best efforts of the emergency response team, could not be resuscitated.
It has been a heart-breaking day at Castle Park as one of our own, Ian Williams, tragically passed away at training this morning. As a Club we pass on our deepest sympathies to Ian's family & close friends & thank the emergency responders 1st on the scene https://t.co/2oOsFuWBEP pic.twitter.com/PsipERCiqi— Doncaster Knights 🏉 (@DoncasterKnight) February 20, 2018
"We extend our deepest sympathies to Ian's mother Pippa, father Phillip and sister Helen and are working with a counselling team in the best interest of Ian's teammates.
"The club will be making no further comment at this time."
Thoughts are with everyone @DoncasterKnight and the family and friends of Ian Williams.— Joe Marler (@JoeMarler) February 20, 2018
England forward Joe Marler expressed his sympathiesin twitter.