"We are afraid to return to the camp, because armed men may come back to attack us, " Fatima Adam Badaui, a woman from the Kassab camp, told UNAMID.

CNN: STORY HIGHLIGHTS

Sen Paul said Mr Holder's responses in that hearing had come close to assuring him the government would not attack Americans with drones in the US, but he said he was "alarmed" by the difficulty of getting the White House to define clearly what qualified as a legitimate target.

BBC: John Brennan confirmed as CIA head after filibuster