WARNING: GRAPHIC IMAGES AND CONTENT. MAY DISTURB SOME VIEWERS. Source: MSF. A Medecins Sans Frontieres (MSF) official called for the immediate evacuation of more than 100 people who were injured when a Nigerian Air Force plane mistakenly bombed an internally displaced persons (IDP) camp in the northeastern town of Rann on Tuesday. At least 52 people were killed in the attack, according to MSF.