US prosecutors reportedly believe that Sepp Blatter's deputy ordered US$10 million ($14 million) to be paid to a football official accused of accepting bribes in return for awarding the 2010 World Cup to South Africa.
According to the New York Times, the US Government has evidence that Jerome Valcke, the secretary general of Fifa, ordered the money to be paid into accounts controlled by one of the nine football executives indicted last week. He denies this.
The claim, if proven, would mean Blatter's closest lieutenant was connected to the bribery scandal and raise fresh questions for the recently re-elected Fifa president.
Valcke, a Frenchman, is a close ally of Blatter and was appointed secretary general in 2007 at Blatter's suggestion. The two men clasped hands after Blatter won re-election.
US prosecutors allege the South African Government paid US$10 million in bribes to Jack Warner, the head of the Caribbean Football Union, and other football officials to secure their votes for South Africa to host the 2010 World Cup.