The ICRC had to stop complaining about the treatment of detainees in concentration camps in case the ICRC was stopped from working for POWs . During the war , the ICRC failed to obtain an agreement with Nazi Germany about the treatment of detainees in concentration camps , and it eventually abandoned applying pressure to avoid disrupting its work with POWs . The ICRC also failed to develop a response to reliable information about the extermination camps and the mass killing of European Jews .