Britain won't accept any cover up in investigations of electoral fraud allegations in Afghanistan, Foreign Secretary David Miliband said Friday. Miliband said the country's Aug. 20 vote wasn't free and fair, but insisted the United Nations-backed Electoral Complaints Commission was proving effective in dealing with complaints of vote rigging. He told British radio the legitimacy of results announced so far in the election was in doubt. Figures show Afghan President Hamid Karzai has more than 50% of the vote, enough to avoid a runoff. Karzai's closest challenger, former Foreign Minister Abdullah Abdullah, has claimed the results were marred by state-engineered fraud. The Electoral Complaints Commission has thrown out votes from 83 polling stations and ordered hundreds of recounts amid claims of ballot stuffing and phantom polling stations.