Rules state that stones must come from naturally occurring island slate, however some were found to have been ground into a "suspiciously circular" shape to help them bounce on water.
Organiser Dr Kyle Mathews told BBC News that the offenders had "held their hands up" and apologised
Dr Matthews, also known as the "Toss Master", told BBC Radio's Good Morning Scotland that judges heard "rumours and murmurings of some nefarious deeds".
"There was a little bit of stone doctoring," he said.
www.bbc.com
Organiser Dr Kyle Mathews told BBC News that the offenders had "held their hands up" and apologised
Dr Matthews, also known as the "Toss Master", told BBC Radio's Good Morning Scotland that judges heard "rumours and murmurings of some nefarious deeds".
"There was a little bit of stone doctoring," he said.
Cheating scandal rocks world stone skimming championships
Several competitors on the Scottish island of Easdale used stones that were ground down to be perfectly circular.
www.bbc.com
