Fifty-three countries have issued a statement to the World Health Organization’s (WHO) annual assembly expressing alarm about allegations of sexual abuse by WHO workers in the Democratic Republic of Congo.

They said WHO leaders knew about the alleged cases but did nothing about them.

Last year, a media investigation found that aid workers tackling an Ebola outbreak forced women to have sex, with at least two becoming pregnant.

The head of the WHO, Tedros Adhanom Ghebreyesus, said the results of an independent investigation into the allegations would report its findings in August.