A senior United Nations official is reportedly stepping down at the end of his contract this week amid allegations of sexually inappropriate behavior toward a female employee.

Dr. Luiz Loures, a U.N. assistant secretary general, is leaving the group after an investigation into claims by Martina Bostrom, who said Loures forced himself upon her and groped her in a hotel elevator after a conference in 2015, CNN reported Friday.

While the investigation, which Bostrom called "deeply flawed," found that her claims were unsubstantiated, her mother, a supervisor and two other co-workers said Bostrom was distraught after the incident.

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A spokesman for the U.N.'s AIDS task force, where Lourdes is also a deputy director, told CNN that the U.N. followed "due process" and that Bostrom could appeal the result.

Two other female employees say Loures assaulted them in a similar manner.

Other U.N. employees told CNN that the organization has also protected another top official facing allegations of inappropriate behavior.

The bout of allegations in the international body comes after months of similar accusations against members of Congress, several of whom have resigned amid ethics investigations and reports of using taxpayer dollars to settle claims against female employees.