S.Sudan admits it downed UN helicopter, killing four
U.N.'s Ban slams attack on "clearly marked helicopter"
Peacekeeper shoots dead three comrades, self in Sudan
The shooting happened at a UNAMID site in Mukjar in West Darfur
South Sudan army denies it downed UN helicopter
A U.N. source said the helicopter was on a reconnaissance mission in an area where the SPLA, South Sudan's army, has been fighting rebels led by David Yau Yau
Regional leaders demand CAR rebels pull back
The rebels complaining that President Francois Bozize had failed to honour the terms of a 2007 peace deal, launched an attack which has brought them to about 300 km (186 miles) from the capital
World Concern Staff Evacuated from Wau, South Sudan
Expat staff members of the humanitarian aid organization World Concern have left the town of Wau, in South Sudan's Western Bahr El Ghazal state, following recent outbreaks of violence between tribes in the area.