Shares in Birmingham City's Hong Kong holding company have been suspended, leading to speculation that the Championship club may be sold.
"At the request of Birmingham International Holdings Limited, trading in its shares on The Stock Exchange of Hong Kong Limited has been halted," it said in a filing to the Hong Kong stock exchange.
The suspension was made "pending the release of an announcement relating to price sensitive inside information of the company", it said.
Birmingham owner Carson Yeung was jailed for six years for money laundering in March but has appealed against the conviction.
Yeung remains the largest shareholder of the club, according to the Hong Kong stock exchange website, despite resigning from all positions at its holding company before the trial verdict.
Birmingham, who were relegated from the Premier League in 2011, have been in talks with several potential bidders over the past few years.
In October 2012, Birmingham Holdings said it was in talks with two potential buyers, a month after it rejected an offer from an unnamed party.
Reports named the failed buyer as an Italian consortium led by Gianni Paladini, the former chairman of Queens Park Rangers, which had offered £12m.
Yeung took control of Birmingham in October 2009 in an £81m takeover from David Sullivan and David Gold who are now the co-owners of West Ham United.