Clonmel-born boxer Michael O'Reilly, a contender for a medal at the Olympic Games in Rio, has been suspended for a drugs violation in advance of the games.
The news has stunned the Irish team in the Brazilian city where the games open this Friday evening.
Middleweight O'Reilly, who boxes out of the Portlaoise club, has been notified of an alleged violation of a doping rule.
O'Reilly won gold at the Baku European Games, a performance that won him third seeding in Rio and he was seen as a real contender for a medal, possibly gold.
He can now either accept the sanction for the doping violation, request that a 'B' sample be tested, or appeal the provisional suspension.
O'Reilly, 23, who was tested before leaving for Brazil, is understood to be considering an appeal.
He had received a bye when the draw for the first round was made on Thursday and was due to meet a Mexican or Iraqi for a place in the quarter finals next weekend.
In the meantime he is temporarily out of the games and his Olympics dream hangs by a thread.