Nordic online gambling operator Betsson AB has abruptly parted ways with its CEO, reportedly due to a disagreement over the company’s black-market operations in Turkey.

On Monday, Betsson issued an official statement saying its board of directors and CEO Ulrik Bengtsson (pictured) had agreed that Bengtsson “shall leave the position as President and CEO” of the company. The notice added that Bengtsson “has chosen to leave his position immediately.”

Betsson’s board has appointed chairman Pontus Lindwall as its temporary CEO until it can find a permanent replacement. Lindwall was Betsson’s CEO until March 2016, when Bengtsson assumed the CEO mantle and Lindwall shifted to chairman.

Board member Patrick Svensk will assume the chairman’s role until further notice, while Betsson’s chief commercial officer Jesper Svensson has been appointed acting CEO of Betsson’s Malta subsidiary.