The International Olympic Committee has launched an investigation into two South Korean sponsorship deals and whether they present a conflict of interest for Pyeongchang's 2018 Winter Games bid.
The IOC said on Friday it was examining a sponsorship with the International Skating Union (ISU) by Korean Airlines as well as a deal involving Korean electronics firm Samsung with the international rowing federation, FISA.
Samsung is already a top Olympic sponsor.
"We can confirm that we are aware of potential conflicts of interests and that, as per IOC procedure, the Ethics Commission is looking into it," an IOC official told Reuters.
The heads of both federations are IOC members and are eligible to vote in next year's 2018 Games host city election.
Korean resort Pyeongchang is bidding for the third straight time to host the winter Games, having narrowly missed out on Vancouver and Sochi for 2010 and 2014 Olympics respectively. Munich in Germany and France's Annecy are also in the running.
The winning bid will be selected in July, 2011.