Over 1 million flee war torn South Sudan

Neighbouring Uganda hosts the highest number of refugees, with 20,000 arriving in the past week.

Children play with hula hoops at the Children Friendly Space, run by Unicef. According to Unicef, South Sudan has the highest proportion of out of school children in the world. Picture: Albert Gonzalez Farran/AFP.

JOHANNESBURG - More than a million refugees have fled South Sudan's three-year civil war, overwhelming aid agencies and creating one of the world's worst humanitarian disasters.

The United Nation (UN) says South Sudan joins Syria, Afghanistan and Somalia as countries that have produced over one million refugees.

UN Refugee Agency spokesman Leo Hobbs calls this a very sad milestone.

Civil war has torn at Africa's youngest country for most of its five-year existence.

Neighbouring Uganda hosts the highest number of refugees, with 20, 000 arriving in the past week from fighting in the southern part of the country.

Ethiopia, Kenya, Sudan, Congo and Central African Republic also have taken in tens of thousands of people fleeing South Sudan

The UN praised the countries, some of the world's poorest, for allowing refugees to enter.