Accusations of hiring mercenaries from South Sudan to take part in the war in Sudan are threatening fragile ties between the two countries.
Khartoum alleges that Juba is complicit in allowing its citizens to join the Rapid Support Forces (RSF), commonly referred to as Janjaweed because it is an offshoot of the previous forced of deadly warriors who rode on horses in the Darfur war in the early 2000s.
