STEPHANIE NEBEHAY SOME 24,000 Eritrean refugees are trapped in two camps in Ethiopia's Tigray region, cut off from humanitarian aid, and their food rations may have run out, according to the United Nations. Appealing for access to the Mai Aini and Adi Harush camps, the U.N. refugee agency said there was "a real danger of hunger" if the refugees did not receive supplies. Fighting that began between the Ethiopian central government and the Tigray People's Liberation Front (TPLF) last November has escalated in and around the camps, and two refugees have been killed this month, it said. "The last food…