Stoke captain Ryan Shawcross believes West Brom leaked the news of Saido Berahino's ban.
The 29-year-old's comments have added to the growing friction following Berahino's transfer from the Baggies to the Potters last month.
Berahino made a £12 million switch to Stoke having been suspended for eight weeks from October to December by the Football Association.
The Daily Mail reported last week he tested positive for a recreational drug during his time at The Hawthorns, although neither club have confirmed the reason for Berahino's suspension.
Stoke boss Mark Hughes hinted he believed the Baggies were responsible for the news coming out less than 48 hours before the Potters' 1-0 defeat at Albion on Saturday, and Shawcross has also voiced his own concerns.