FIFA placed its own president under investigation Friday in a widening bribery scandal just days before he is scheduled to face re-election. FIFA said Sepp Blatter, who is accused of turning a blind eye to alleged bribes being paid to Caribbean voters, must submit a statement by Saturday before facing an ethics committee hearing in Zurich on Sunday. With both Blatter and rival candidate Mohamed bin Hammam now under investigation, it is unclear whether next Wednesday's election will go ahead. "I cannot comment on the proceedings that have been opened against me. The facts will speak for themselves," Blatter said in a statement released by his campaign advisers. Bin Hammam and senior FIFA official Jack Warner were summoned Wednesday to face the ethics panel on charges of bribing voters during a Caribbean campaign visit. The allegations were leveled by American FIFA executive committee member Chuck Blazer. Blatter, who is seeking a fourth term as president, has described suggestions he "masterminded" the scandal to remove his Qatari rival from the race as "ludicrous."