Afghanistan's run-off election will take place as scheduled this week despite the withdrawal of President Hamid Karzai's only challenger from the contest, the election commission said Sunday. 'The deadline to withdraw has passed, therefore the commission is determined to conduct a run-off election,' the government-appointed Independent Election Commission's chief electoral officer, Daoud Ali Najafi, told selfnews. 'We'll go for a run-off as scheduled,' Najafi added. 