Saying it was “shocked at the highest level,” the government of Haiti has suspended the aid group Oxfam Great Britain for two months while it investigates allegations of sexual misconduct by charity employees in the aftermath of the devastating 2010 earthquake.

The government took the step two weeks after the organization, the British arm of the umbrella group Oxfam International, acknowledged that employees had been fired or resigned after they were found to have had sex parties with prostitutes in staff housing.

On Thursday, the Haitian minister of planning and external cooperation, Aviol Fleurant, said officials were looking into the incidents and trying to determine whether any of the women were underage.

The government raised the prospect that the British aid organization, which spends $3.9 million annually in Haiti, may not be allowed to resume its work. Mr. Fleurant told Reuters that if investigators establish a link between donations to Oxfam meant for Haiti and criminal activity, officials will “declare Oxfam Great Britain persona non grata, and they would have to leave the country without further delay.”