In early May the International Committee of the Red Cross announced that it had suspended all of its relief efforts in Sudan pending an investigation into the downing of a Red Cross plane.
The plane had been on a routine relief flight over southern Sudan when it was attacked by as yet unknown forces on the ground and was severely damaged. Both rebel and government forces are known to be operating in the area where the plane was attacked.
Badly damaged, the pilot did manage to get the plane back to its base in Kenya, but a 26-year-old Danish co-pilot was killed instantly by the attack.
Source:
Red Cross halts flights over Sudan. The BBC, May 9, 2001.