Fifa presidential candidate Prince Ali bin al-Hussein has described the arrests of six Fifa officials as a "sad day for football".
"Today is a sad day for football," Jordan's al-Hussein - who is challenging Sepp Blatter - said.
"Clearly this is a developing story, the details of which are still emerging.
"It would not be appropriate to comment further at this time."
Chief Executive of the Irish Football Association John Delaney has admitted Fifa paid the organisation to avoid a legal case.
FIFA has said that Julio Grondona, who died last year, authorised a $10m payment that is at the heart of the bribery scandal.
Prince William outlined a "huge disconnect between the sense of fair play" and "allegations of corruption" within Fifa.