Oxfam, one of Britain’s biggest charities, has condemned the behavior of some former staff in Haiti after a report in The Times newspaper said aid workers paid for sex while on a mission to help those affected by the 2010 earthquake.

Britain’s aid minister said the government would cut aid funding from any charity that did not comply with a new review into their work overseas, calling reports of sexual exploitation in the sector “utterly despicable.”

Winnie Byanyima, who became executive director of Oxfam International in 2013, said she was saddened by what took place in 2010 and that it could not happen under systems and rules put in place since.

“I feel deeply, deeply hurt. ... What happened in Haiti was a few privileged men abusing the very people they were supposed to protect - using the power they had from Oxfam to abuse powerless women. It breaks my heart,” Byanyima said in an interview with Reuters TV in New York.

“We want to restore trust. We want to build that trust. We are committing to be honest, to be transparent and to be accountable in addressing this issue of sexual misconduct. We are in a different place today,” she said.

British Aid Minister Penny Mordaunt said on Sunday that she would write to British charities that work overseas demanding they declare any problems relating to the duty they have to protect their staff and the people they work with from harm and abuse - so-called safeguarding.

Byanyima said charities must stop people who do not share their values from joining their organizations.

“We need to do more in terms of investigations and sharing the results of those investigations so that offenders don’t go on to offend in other organizations,” she said.

She said Oxfam would share with the relevant authorities all the information it had relating to the 2010 incident.

“You know it’s not within our power to return people who are not our staff to Haiti to face prosecution,” she said. “But we will avail everything that we know from the investigation to whoever authority, whichever authority wants to have this.”

On Friday, Oxfam said allegations that underage girls may have been involved were not proven, It said four members of staff were dismissed as a result of the investigation and three resigned before the end of the investigation.

Reuters could not independently verify the allegations contained in The Times report and was unable to immediately reach any of the Oxfam staff who worked in Haiti.

Oxfam neither confirmed nor denied The Times newspaper report but said its misconduct findings had “related to offences including bullying, harassment, intimidation and failure to protect staff as well as sexual misconduct.”