The executive director of the Chinatown Business Association (CBA) is assisting in investigations by the Corrupt Practices Investigation Bureau - allegedly over the construction of the Chinatown Visitor Centre.
Mr James Ong, 48, is said to have gone to the anti-graft agency around two weeks ago for questioning.
Its investigators have also reportedly made two visits to the CBA office to take away files and a computer.
The centre was officially opened in January last year at Kreta Ayer Square.
CBA chairman Bernard Leong confirmed to The Straits Times yesterday that Mr Ong is "currently assisting the CPIB" in investigations, but he said he was neither aware of the subject matter nor the details of the investigation.
According to Lianhe Zaobao, Mr Leong also said Mr Ong continues to report to work.
Mr Leong told The Straits Times that the CBA's executive committee will be meeting today to discuss this matter.
"I will be seeking the exco's approval to appoint our honorary legal adviser to advise us on any further course of action, if any," he said.