BEIRUT (AP) — An international aid organization says millions of children in Syria are at risk of malnutrition as the conflict rages well into its third year and food production is collapsing across the country.

Save the Children says four million Syrians — more than half of them children — are unable to produce or buy enough food.

Thousands are living in battle zones around Syria's major cities, cut off from access all but the bare minimum foodstuffs needed to survive, the U.S.-based group said in a report on the state of hunger in Syria.

The group says one in 20 children in areas around Damascus is severely malnourished. And severe food shortages are being compounded by an explosion in prices for basics.