A British-born aid worker is one of two Medecins Sans Frontieres members of staff to have been released on bail in Sudan.
The pair were held last week after the charity published a report exposing the scale of rape in the troubled Darfur region of the north-east African state.
They were arrested for alleged crimes against the state, publishing false reports, spying and undermining Sudanese society.
The Sudanese authorities issued verbal assurances that the men - MSF Holland's head of mission, Paul Foreman, who is originally from Surrey, and Dutchman Vincent Hoedt - were likely to have the charges dropped.
But as Third Sector went to press, both men were still on bail and not allowed to leave the country.
"These arrests are totally unacceptable," said Geoff Prescott, general director of MSF-Holland.
"The government is punishing humanitarian aid workers simply for doing their jobs for victims of conflict in Darfur."