Wales have been handed an official warning by World Rugby for having players outside of their 31-man squad training with the side.
The governing body issued a statement on Thursday after reports circulated suggesting as many as six players outside of the set World Cup squad had been working with Warren Gatland's side.
"The Wales team has been issued with an official warning following an apparent breach of the spirit of the Rugby World Cup 2015 Terms of Participation regarding team training arrangements and specifically the inclusion of players from outside the selected 31-player squad for a training session yesterday," read a statement from World Rugby.
"Having reviewed the matter, World Rugby is satisfied that no deliberate breach was intended, and in addition to the formal warning to the Welsh team, all participating teams have been informed that additional players from the extended national team squad, including potential injury replacements, may not participate in any training sessions."
Wales, who have been hit hard by injury, face England at Twickenham on Saturday.