NOBEL Peace Prize winner Desmond Tutu has said he will no longer be a global ambassador for Oxfam.

The announcement comes after allegations that senior staff members in crisis zones paid for sex among the desperate people the group was meant to serve.

A statement from the office of the South African emeritus archbishop says he is ‘deeply disappointed by allegations of immorality and possible criminality’.

The 86-year-old rarely makes public statements because of health problems.

Actress Minnie Driver and Senegalese musician Baaba Maal also have quit as celebrity ambassadors for Oxfam following its response to a sex abuse scandal in Haiti after its 2010 earthquake.