Health officials in South Sudan report an increase in meningitis cases in Northern Bahr al Ghazal State; A new report by the United Nations Mission in South Sudan (UNMISS) says cases of conflict-related sexual violence more than doubled between January and March compared to the same period last year; Authorities in Warrap State say calm has returned to the area following deadly fighting which left 21 people killed and more than a dozen injured in Gogrial East County on Sunday.