Attacks in Nigeria's restive northeast by Islamist group Boko Haram have killed more than 1,200 people since May, when a state of emergency was declared in the region, the United Nations said Monday. "Some 1,224 people have been killed in Boko Haram related attacks," since May in Adamawa, Borno and Yobe, the three states placed under emergency rule on May 14, the UN's humanitarian office (OCHA) said in a statement. Spokeswoman Choice Okoro separately told AFP that figure did not include those killed during military operations.