NEW : As of Monday , some 65,000 displaced people were crammed into camps in Vavuniya , Jaffna and Mannar , with 35,000 more expected to arrive within 48 hours , the organization said in a statement . ' Fears raised by UNICEF for children caught in the escalating fighting . Upsurge in hostilities follows celebrations for New Year . U.N. humanitarian chief : Large number of people killed in very small area . Tamil Tigers , Sri Lanka government locked in conflict lasting nearly two years .
NEW : Fears raised by UNICEF for children caught in the escalating fighting . Upsurge in hostilities follows celebrations for New Year . U.N. humanitarian chief : Large number of people killed in very small area . Tamil Tigers , Sri Lanka government locked in conflict lasting nearly two years .