Updated

Famine has spread into one more region of Somalia, leaving 4 million people in the lawless Horn of Africa nation in crisis, the United Nations said Monday.

Southern Somalia's Bay region is the latest region to be declared a famine zone, according to a U.N. press release issued Monday. A total of six areas, including four southern Somali regions and two settlements of internally displaced people, are now suffering from famine. The press release says 750,000 people are at risk of death in the next four months if there is no adequate response.

The U.N. says tens of thousands of people already have died in Somalia, Kenya, Ethiopia and Djibouti due to the severe violence, drought and famine that still has not peaked. More than 150,000 refugees have sought aid in the last few months.

Somalia has been hit hardest, its problems compounded by the fact it has not had functioning government since 1991.