The airlift is part of a crisis intervention as famine threatens to spread across lawless Somalia.
David Orr, a World Food Program spokesman who flew with the shipment from neighboring Kenya to the Somali capital of Mogadishu, said it was the first airlift of food aid since the UN declared a famine in parts of Somalia last week.
Orr said the aid would be distributed to medical facilities to treat the malnourished children.
WFP spokeswoman Challiss McDonough said this is first of several planned airlifts in coming weeks. She said Wednesday’s shipment of peanut butter-based nutritional paste will treat 3,500 malnourished children for one month.
McDonough said WFP decided to send in the airlift because of an urgent need to treat the growing number of internally displaced children suffering from malnutrition before their condition deteriorates.
She said about 18,000 children are suffering from malnutrition and that the number is expected to grow to 25,000.
WFP says it cannot reach 2.2 million people in need of aid in the militant-controlled areas in southern Somalia.
Somalia has been embroiled in conflict for two decades, since the last leader was overthrown by warlords who then turned on each other. Islamist militant groups have spent the last few years battling the weak UN-backed government in an attempt to overthrow it.
Al-Shabab — the most dangerous militant group in Somalia — said last week it will not allow the aid groups to operate in its territories, exacerbating the drought crisis.
Earlier this month al-Shabab, which has links to al-Qaeda, had shown indications of wavering on its 2009 ban on certain aid groups in its territories.
The drought has created a triangle of hunger where the borders of Ethiopia, Kenya and Somalia meet. WFP estimates more than 11.3 million people need aid across drought-hit regions in East Africa. The majority of those affected live in pastoral communities whose herds have been wiped out because of a lack of water.
Separately, Unicef said on Wednesday that it is trying to vaccinate more than 3,00,000 children in Kenya in an emergency programme designed to prevent an outbreak of disease as refugees stream into northern Kenya.
Jayne Kariuki from Unicef said that four northern Kenyan regions will be targeted along with Dadaab, the world’s largest refugee camp.