The board of advertising giant WPP is investigating alleged misconduct by its prominent founder, Sir Martin Sorrell.
WPP has hired a law firm to investigate “an allegation of personal misconduct against Sir Martin Sorrell,” according to a statement from the firm.
The investigation involved personal behaviour and possible misuse of assets, according to reports from The Wall Street Journal.
The allegations against Sorrell, who founded the firm, do not include monetary amounts which are "material to WPP", the statement added.
Sorrell was awarded a £1.8m bonus earlier this year, although WPP shares have suffered in the face of a difficult environment for advertising agencies around the world.
The WPP statement said: "The board of WPP has appointed independent counsel to conduct an investigation in response to an allegation of personal misconduct against Sir Martin Sorrell, chief executive officer of WPP. The investigation is ongoing. The allegations do not involve amounts which are material to WPP."