LONDON (AP) — A group of Olympic athletes from around the world has backed a campaign against child malnutrition in poor countries.

Olympians including Ethiopian runner Tirunesh Dibaba and British long jumper Greg Rutherford, both gold medal winners at the London Games, are among athletes who have written an open letter to Prime Minister David Cameron ahead of a so-called "hunger summit" at the leader's residence in No.10 Downing Street.

The letter urged Cameron to prioritize a push against malnutrition when Britain takes the presidency of the G8 next year.

Sunday's summit brings together leaders from Brazil, Kenya, Bangladesh, India and Ireland. Also invited are Ethiopian distance runner Haile Gebrselassie and Brazilian football star Pele.