Over the last week, South Sudanese authorities expelled two top officials from the Norwegian Refugee Council, one of the largest international aid groups working in the country.
"It's hugely concerning ... in part because we truly don't know why," says Joel Charny, head of the Norwegian Refugee Council's U.S. office. "For no reason whatsoever, our country director is detained for nearly 24 hours and then asked to leave. Now an area manager is asked to leave. It's puzzling because we don't know what we've done wrong."