LONDON — Three Oxfam employees who were the subject of a 2011 inquiry into sexual misconduct in Haiti physically threatened a witness after a manager leaked an investigation report to another member of staff, the charity said on Monday.

The threats and intimidation were among several accusations of misconduct made public for the first time with Oxfam’s release of its 2011 report into the conduct of its Haiti staff, including the hiring of prostitutes.

The report states that two of the three people who threatened a co-worker were also accused of “sexual exploitation and abuse of employees,” in addition to hiring prostitutes. It does not say whether Oxfam concluded that the claims of mistreatment of colleagues were true, but it says that both of the accused were among four employees “dismissed for gross misconduct,” and that one of them was guilty of “failure to protect staff.”

Oxfam, one of the largest British charities, had previously acknowledged that it had fired four people working on earthquake recovery in Haiti, and that three others resigned during or after the investigation, following allegations that they had hired prostitutes on the group’s premises outside Port-au-Prince.