ZURICH: FIFA presidential candidate Mohamed Bin Hammam fought back in an increasingly bitter election fight Thursday, calling for Sepp Blatter to be investigated in a spiraling bribery scandal. Bin Hammam urged the FIFA ethics panel, which is investigating him over allegations he tried to bribe voters in the Caribbean, to also examine the FIFA president's behavior. The Qatari challenger said that evidence submitted to FIFA suggests Blatter broke its code of ethics by not reporting an apparent corruption attempt. “The accusations also contain statements according to which Mr. Blatter, the incumbent FIFA president, was informed of, but did not oppose, payments allegedly made to members of the Caribbean Football Union,” Bin Hammam said in a statement. Bin Hammam insisted that the scandal is a concerted “plan to damage” him and force him to withdraw from next Wednesday's election. Bin Hammam's attack on his former ally was issued just three hours after the two men met and hugged at FIFA headquarters before a scheduled meeting of its finance committee. At about the same time, Blatter's regular campaign column for a football website talked of Bin Hammam's “public humiliation,” and denied the allegations were timed to wreck his opponents's chances of taking over football's top job. Blatter wrote that he was “shocked” by the corruption allegations against Bin Hammam which shed “a very bad light on FIFA yet again,” days before next week's scheduled presidential vote. “It gives me no pleasure to see (Bin Hammam) suffer public disgrace before an investigation would even have started,” Blatter said in a column on the Inside World Football website. Bin Hammam, the Asian Football Confederation president, and FIFA vice president Jack Warner face an ethics hearing in Zurich Sunday over allegations stemming from the Qatari's May 10-11 campaign trip to Trinidad. “I take no joy to see men who stood by my side for some two decades, suffer through public humiliation without having been convicted of any wrongdoing,” Blatter said. The ethics panel can effectively hand Blatter victory in next Wednesday's election by suspending Bin Hammam from all football duty. The panel could rule that wrongdoing was proven, or it could provisionally bar Bin Hammam if it requests more time to study evidence compiled by a federal prosecutor from Chicago who works for Warner's CONCACAF regional body. Though expressing sympathy for his longtime Qatari ally, Blatter said he admires American official Chuck Blazer's “civic courage” for reporting the alleged bribery to FIFA headquarters. Blatter was indignant at suggestions he was part of a conspiracy to remove his election rival from the race.