UN's Food and Agriculture Organization is calling for more help as it says there's no let-up in the famine in the Horn of Africa.

Its Director General, Jacques Diouf, says the famine has spread further to three other regions in Somalia, while Kenya and Ethiopia have seen inflows of refugees across their borders as they struggle to cope on their own.

Diouf says the degradation of resources, lack of water for crops and cattle, along with conflicts in the region have all contributed to the problem. He says while human rights groups and efforts by local governments have reached those mostly in need, finding a sustainable solution is urgent. He is also urging the use of quality seeds and improved irrigation techniques before the rainy season begins in October and next spring.