The United Nations is investigating claims of sexual harassment made by a member of staff against Ruud Lubbers, the High Commissioner for Refugees.
Lubbers denied he had been involved in any improper behaviour
In a statement, Mr Lubbers said the accusation had been made in April, and related to a meeting that took place in his office in December last year.
The New York Times said the claim had been made by an American woman who had worked for the UNHCR for many years.
Mr Lubbers denied that he had been involved in any improper behaviour.
Mr Lubbers, 65, was appointed to head the refugee agency in 2000. His original
term was extended last year and expires at the end of 2005.
Previously, he served as Dutch prime minister between 1982