A corruption scandal at the top of Turkish league football is spreading.
The chairman of Fenerbahce, Aziz Yildirim, has been remanded in custody pending trial on charges of match-fixing and forming a criminal organisation.
He is now one of 26 people detained after police raids prompted by evidence of match-fixing in 19 games.
After his arrest Yildirim was taken to hospital as scores of fans gathered to voice their anger.
With Yilidrim behind bars reports emerged from Turkey that the chairman of rival club Trabzonspor was also detained as part of the inquiry.
Turkey’s Prime Minister Tayyip Recep Erdogan, who is an avid Fenerbahce supporter and member of the club’s congress, called on fans to respect the judicial process.
But should the allegations prove true Fenerbahce are facing the prospect of being stripped of their title and being excluded from international competition, a prospect the fans found difficult to take with less than a month to go before the start of the new season.
There were ugly scenes outside the courthouse in Besiktas where police came under a hail of stones and cans.