Four scientists known for their work in fighting malnutrition have won this year's World Food Prize and will split the $250,000 prize.

Three of the laureates -- Maria Andrade, Robert Mwanga and Jan Low -- work for the International Potato Center. They were honored for the development of the orange-fleshed sweet potato. Andrade and Mwanga, plant scientists in Mozambique and Uganda, bred the vitamin A-enriched potato, while Low lede nutrition studies and programs that helped persuade almost 2 million households in 10 African countries to plant, purchase and eat the food.

The other winner, Howarth Bouis, founder of HarvestPlus at the International Food Policy Research Institute, pioneered the implementation of a multi-institutional approach to biofortification as a global plant breeding strategy. His work led to crops such as beans, rice and wheat fortified with iron and zinc being tested or released in more than 40 countries.

The announcement was made at the U.S. State Department in Washington, D.C.

Read the full news release.