The inquiry will also "assess what additional actions will need to be taken by the charity in order to address the findings from the inquiry's work and to assist in restoring public trust and confidence in Oxfam". "From the bottom of my heart I am asking for forgiveness".
"I'm here for all the women who have been abused. I'm here for all the women who have been abused, I want them to come forward and for justice to be done for them", she added.
"I think we need to be fully aware that this is a serious problem that is everywhere, in public administrations, in the private sector, in global organizations like the UN.in the civil society and in nongovernmental organizations", Guterres said.
Oxfam officials had been summoned to meet with his ministry staff on Thursday to explain the accusations of sexual misconduct, Fleurant said.
Ms Byanyima, the most senior Oxfam executive to speak on the issue, said she first heard of the controversy after news reports last week. "We are engaged with Oxfam to understand what steps have been taken to address staff misconduct and ensure alignment with our own standards and values".
Haiti's president told Reuters on Friday that sexual misconduct by Oxfam staff was only the tip of an "iceberg" and called for investigations into Medecins Sans Frontieres (Doctors Without Borders) and other aid organisations that came to the country after a devastating natural disaster in 2010.
Oxfam said that four members of staff implicated in misconduct were fired, and a further three including the country director at the time left voluntarily during an internal investigation in 2011.
"I think taxpayers will be appalled aid money may have been used in such an terrible way".
"I'm not a saint, I'm a man of flesh and blood and have made mistakes (not easy to admit), and I am deeply ashamed", he said.
Addressing the allegations, Van Hauwermeiren acknowledged his behavior was unacceptable.
IDF soldiers wounded, 2 seriously, by explosive device at Gaza border
"Four IDF soldiers were wounded, including two severely, one moderately and one lightly", the Israeli army said in a statement. Israel and Egypt imposed a blockade in an attempt to weaken Hamas, and Israel and Hamas have fought three wars.
He added that he would "soon" make an official statement through his lawyer.
Oxfam's Chief Executive, Mark Goldring, has said the scale and intensity of the criticism against the British charity in the wake of claims that its workers used prostitutes in Haiti, were out of proportion to its level of culpability.
Oxfam's reputation has taken a battering after it was accused of attempting to cover up the behavior of some of its senior staff members deployed to Haiti in the aftermath of the devastating 2010 natural disaster.
Bev Jackson, 65, a carer, of Bell Street, Henley, said: "I just think it's very sad".
The Times of London reported last week that young sex workers were hired by senior staff in Haiti after the quake which devastated the poor Caribbean country and left up to 300,000 people dead.
The charity said it had received a reference from someone claiming to be his former Oxfam boss, sent from a private email account.
Haiti could also revoke Oxfam's right to operate in the Caribbean island, said Aviol Fleurant, the minister of planning and external cooperation.
Gurpreet Singh worked as a consultant in Ethiopia from October to December 2011, a decision Oxfam said was "a serious error and should never have happened".
UK-based NGO Save the Children warned Oxfam that aid workers had been sexually abusing children in Haiti ten years ago, the Independent newspaper reported.