Dutch airline KLM will probably seek an independent investigation into whether it flew Nazi fugitives to Argentina after the Second World War, the national airline said on Tuesday. Questions over KLM's past surfaced last week after a Dutch television documentary claimed to have discovered archive documents showing the airline played an active role in helping suspected war criminals flee Germany. KLM, now part of Air France, said it had never found any proof in its own archives about flying Nazis to Argentina but had also never denied a possible involvement.