Islamic State fighters kill 220 Iraqis from tribe that opposed them

BAGHDAD (Reuters) - Islamic State militants executed at least 220 Iraqis in retaliation against a tribe's opposition to their takeover of territory west of Baghdad, security sources and witnesses said.

Two mass graves were discovered on Thursday containing some of the 300 members of the Sunni Muslim Albu Nimr tribe that Islamic State had seized this week. The captives, men aged between 18 and 55, had been shot at close range, witnesses said.