Oct 1 (Reuters) - Turkey's soccer ⁠federation has provisionally suspended 448 current and former club ⁠officials, including Trabzonspor President Ertugrul Dogan and Besiktas Vice-President Hakan ‌Daltaban, as part of a sweeping investigation into betting.

The suspended officials, who served at clubs in the country's two highest divisions during the 2026-27 season, were ​found to have placed bets whilst in ⁠office over the past five ⁠years, the Turkish Football Federation (TFF) said in a statement.

All 448 have ⁠been ‌referred to the federation’s disciplinary committee.

Media reports said the list published by the TFF on Wednesday included about ⁠171 officials who had served at clubs in the ​top-flight Super Lig.

Dogan ‌said he previously held a betting account and had ⁠disclosed it to ​the authorities.

"These companies sponsored clubs and held launch events. Nobody thought this would cause problems... if we made a mistake, we apologise, but ⁠we have done nothing wrong," Dogan told ​broadcaster A Spor.

Reuters has contacted Trabzonspor and Besiktas seeking comment from the clubs, Dogan and Daltaban.

The TFF has tightened its oversight of betting ⁠since a scandal rocked Turkish soccer last year. The federation suspended about 149 referees and 1,024 players for various periods of time as part of the investigation.

Several top-tier players and high-ranking club ​officials were then jailed in a crackdown ⁠on illegal betting and match-fixing in the country's professional leagues.

In a ​separate investigation, Turkey detained the head and ‌six members of its main soccer ​referee board on Tuesday over accusations of interference in refereeing procedures.

(Reporting by Chiranjit Ojha in KolkataEditing by Toby Davis)