Chad has been hit by a refugee influx from Darfur and Central African Republic as well as the return of its citizens expelled from Libya.
The CAR's president has insisted he has been negotiating with Joseph Kony after Washington rubbished claims that Kony was involved in any talks.
The precious stones do fuel corruption, but the real crisis in the country is political, writes David Smith.
The Central African Republic is at risk of spiralling into genocide as a humanitarian crisis and fighting between Muslim and Christian rebels intensifies.
An attack on the town of Bouar in western Central African Republic has forced civilians to flee the area, says a military source and residents.
France's leader brought gifts for South Africa, but ultimately focused on intervention further north.
Six months after a coup ousted former president François Bozizé fighting between rebels and villagers in the town of Bossangoa continues.
Central African Republic troops have battled fighters loyal to the ousted president on the second day of clashes that have killed at least 60 people.
"The humanitarian crisis in the Central African Republic (CAR) is worse than it has ever been."
President Michel Djotodia has declared three days of mourning after 37 people were killed when a gold mine collapsed in Ndassima.
Fifa says it is investigating violence in CAR before it decides if the country's World Cup qualifier against Ethiopia can take place in the nation.
Fighters loyal to the CAR's new government have killed five rebels near the Cameroon border, while their leader escaped on horseback.
Central African Republic's toppled president Francois Bozizé has abandoned his attempt to fly to SA from exile in Cameroon, his advisor has said.
Defence Minister Nosiviwe Mapisa-Nqakula has confirmed that South Africa had deployed troops in countries neighbouring the Central African Republic.
Two women, a civilian and a medic, have received a special mention for bravery in the CAR from Defence Minister Nosiviwe Mapisa-Nqakula.
State Security Minister Siyabonga Cwele has indicated that South Africa might consider sending its troops back to the Central African Republic.
Goodluck Jonathan's visit to SA has sounded just the right note at a moment when this country's international reputation has taken a beating.
Chad has arrested a group of people for conspiring in what the government describes as a "destabilisation plot".
President Jacob Zuma and International Relations Minister Maite Nkoane-Mashabane will attend a meeting about the Central African Republic.
Germany's Foreign Affairs Minister Guido Westerwelle has lauded South Africa for its interventions in strife-torn countries on the African continent.