UNHCR said more than 81,000 Burundians now live in Rwanda, with children making up half of the refugees there, many of whom are unaccompanied.
Food is scarce, and drugs and violence all too common in the sprawling centres organised by the United Nations High Commissioner for Refugees.
It was Yiech Pur Biel's participation in the Rio 2016 Olympics as a member of the Refugee Olympic team that led to his mother finding him.
Burundi's president Nkurunziza gives southern rebels two weeks to surrender, or face full force of military
The violence that has gripped the landlocked country and left more than 470 people dead since April 2015
Machar is to be sworn in to his former position as vice president, with the parliament and cabinet expanding to incorporate his rebel allies
Far away in Brazil, Congolese refugee pushes to compete in Rio Olympics as part of the Games' first stateless team
His food vouchers were stolen by corrupt team officials and he lost in his first bout. That was the final straw
Some of the rebels were visibly nervous, but others were more cheerful and raised fists into the air as their leader shouted "Viva SPLA, viva SPLM!"
First, they became independent from Khartoum. Now over 55,000 South Sudanese flee to Sudan in three months
South Sudan became independent from Sudan in 2011, but two years later it descended into a brutal civil war that has killed tens of thousands
The International Olympic Committee announced the creation and funding of Team Refugee Olympic Athletes
The conflict in South Sudan has led to "one of the most horrendous human rights situations in the world"