Yahya related to me from Malik that he heard that Umar ibn Abdal-Aziz gave a decision that when a jew or christian was killed, hisblood-money was half the blood-money of a free muslim.Maliksaid, "What is done in our community, is that a muslim is not killedfor a kafir unless the muslim kills him by deceit. Then he is killedfor it."
USC-MSA web (English) reference: Book 43, Hadith 8
Arabic reference: Book 43, Hadith 1582