Helen Clark says allegations that she retaliated against a critical investigation of the United Nations by driving one of the investigators out of their job are "totally fabricated".
The former New Zealand Prime Minister and leading candidate for the UN's top job also said other revelations in a Foreign Policy article published overnight were made up.
The article said that while there was strong popular support for Clark to take on the job, "many of her own UN colleagues are not rooting for her".
Clark's seven-year tenure in charge of the UN Development Programme (UNDP) had "left a trail of embittered peers and subordinates", Foreign Policy said. Her UN colleagues had accused of her of "ruthlessly ending the careers of underlings in her quest to advance her candidacy and of undercutting the UN's promotion of human rights".
The most serious allegation was that Clark's senior staff had forced out American-Swedish UN official Lena Sinha after she had participated in an investigation which was critical of the UNDP's response to mass atrocities in Sri Lanka. The investigation, called the Petrie Report, criticised senior members of Clark's agency, saying that they had downplayed the Sri Lankan Government's role in killing thousands of Tamils.