Washington (AFP) - Afghan President Hamid Karzai has vowed to remove corrupt officials from government, after high-profile international criticism that graft has undermined coalition war efforts. In an interview to be broadcast Monday, Karzai told PBS that individuals who are involved in corruption will have no place in the government. His comments come after warnings from the UN and others that Afghanistan could see billions in international asistance dry up unless his new government tackles corruption. But he dismissed allegations widely made against top officials, including his brother, Wali widely accused of being involved in the opium trade. Karzai said he had asked US and European officials to present evidence of his brothers alleged corruption, but there was never an answer. Where we have found such corruption, we have addressed it, he said, adding that allegations his brother also worked for the CIA doesnt surprise me at all, because the CIA was in contact with a lot of people.