Nigeria, June 14 -- Sudanese women and girls living as refugees in Chad are being subjected to sexual exploitation and abuse, according to Doctors Without Borders, an international humanitarian organisation.

The aid group said it carried out an investigation and found that women and underage girls are compelled by locals and some foreign staff to trade sex for food, water and milk. It also found cases of women and underage girls being compelled to trade sex for jobs. Some women were also forced into prostitution.

The organisation, known by its French initials MSF, is one of the biggest organisations responding to the humanitarian crisis in Chad. It provides nutrition and medical support, sanitation and other emergency humanitarian assis...