The comments from Haitian President Jovenel Moise add to the condemnation the anti-poverty charity has received since the Times revealed last week some Oxfam employees paid for sex while working in Haiti among people devastated by the 2010 quake.
The 48-year-old later tweeted: "All I can tell you about this bad revelation about Oxfam is that I am devastated".
Asked about Evans's allegations, Oxfam said her work had spurred the organisation into taking concrete steps to improve the way it deals with "safeguarding" issues.
Oxfam, which received €1.7 million ($2.1 million) in funding from the European Union for work in Haiti in 2011, is being accused of covering up the episode and failing to warn other aid agencies about the employees involved, which allowed them to get jobs among vulnerable people in other disaster areas.
Chris Rock's new stand-up special to debut today
Titled Tamborine , the hour-long stand-up special will hit the streaming service tomorrow (February 14). Today, Netflix announced a surprise Valentine's Day treat for all the lovers out there.
The Charity Commission has also opened a statutory inquiry into Oxfam, saying the organisation may not have "fully and frankly disclosed material details about the allegations at the time in 2011".
Oxfam has denied covering up the scandal, which triggered the resignation of its deputy chief executive on Monday.
There were reports on Wednesday that there had already been complaints about van Hauwermeiren when he worked for the British medical charity Merlin in Liberia.
The Charity Commission said it had contacted Save The Children to establish if it had records of Ms Miller's complaints.
Oxfam said that with 10,000 NGOs working in Haiti alone in 2011, "it was unfortunately not possible for Oxfam to ensure that those found guilty of sexual misconduct were not re-employed in the sector". On average there are 600 cancellations per month. "The case for the type of work done by Oxfam is too strong to allow it to be undermined by bad behaviour", he said.
Olympic snowboarder taken to hospital after scary halfpipe crash
A group of medics rushed out and eventually helped Totsuka off his back and into the awaiting sled. He bounced hard off the lip and fell nearly 10 metres to the bottom of the 'pipe.
Penny Mordaunt, the worldwide development secretary, said that she would meet the National Crime Agency (NCA) tomorrow after talks with charity bosses and regulators.
Ms Mordaunt is due to give a speech to representatives from global aid agencies and ministers from over 20 countries at the Agenda 2030 for Children: End Violence Solutions Summit.
At an event in Stockholm to find ways to end violence against children, she said: "No organisation is too big, or our work with them too complex, for me to hesitate to remove funding from them if we can not trust them to put the beneficiaries of aid first".
The official charity of the UK's Catholic bishops hired a former Oxfam worker who was involved in that charity's sex-with-earthquake victims scandal, which is just now coming to light.
In another blow to the Oxfam brand, prosecutors in Guatemala said that they had detained Juan Alberto Fuentes Knight, the chairman of Oxfam International.
Woman has 14 worms pulled out of her eye
Doctors believe Beckley was infected while she was traveling through cattle fields in southern OR , according to USA Today. A parasitic eye worm called Thelazia gulosa is pretty common in the northern USA and southern Canada - at least in cows.