SINGAPORE — UOB has denied allegations of improper conduct made by the former boss of a former client which have surfaced online, calling them baseless and defamatory in a March 28 Facebook post.

The Monetary Authority of Singapore (MAS) said separately that it is looking into the allegations made by Koh Kien Chon, who is also known as Ken Koh.

He used to be the chief executive of Yang Kee Logistics, a client of UOB. The company has since folded.