GENEVA (AP) — The U.N. agency that fights AIDS says that it's reopening a sexual harassment investigation against a top official, saying additional allegations have emerged against him.

UNAIDS says it was reopening the investigation into a case against deputy executive director Luiz Loures that centers on a complaint from a lower-level employee during a stay at a Bangkok hotel in May 2015. Loures has denied the allegations.

A UNAIDS statement Monday said that World Health Organization Director-General Tedros Ghebreyesus requested that the U.N.'s internal oversight office conduct the new investigation. The WHO office of internal oversight services in September threw out the case, citing "insufficient evidence." Critics say the review process was flawed.

UNAIDS didn't immediately give specifics about the new allegations against Loures.