The United Nations is set to declare famine in parts of southern Somalia, signalling to donors the need for more aid and to insurgents that the population's suffering is being taken seriously. Mark Bowden, humanitarian coordinator for Somalia, was expected to make the announcement in Nairobi, based on fresh data from the food security and nutrition analysis unit for the violent Horn of Africa country, aid officials told the Reuters news agency on Tuesday. 'It will declare famine in several areas of southern Somalia,' a Geneva-based aid worker said. The world body has described the Horn of Africa drought as an emergency, one level short of a famine, citing dire levels of acute malnutrition among Somali children reaching camps in Kenya and Ethiopia.