A female international staff member working for the Red Cross in the northern Afghan city of Mazar-i-Sharif was shot dead on Monday by a hospital patient, officials said.
Police said that two arrests had been made and an investigation was under way.
Sheer Jan Durani, a spokesman for the police chief in Balkh province, said two patients were admitted to hospital and one took out a pistol apparently concealed in a wheel chair and shot the woman. Both men were arrested, he said.
A spokesman for the International Committee of the Red Cross in Kabul confirmed that the staff member had been killed but gave no immediate details.
He said a statement would be released later.