Kerry dispatches Special Envoy Kerry dispatches to Juba . Fighting grows after a reported coup attempt in South Sudan over July . Unknown assailants attack a U.N. base in world 's newest nation . CNN 's Zain Verjee and Clare Hayes contributed to this report . as many as 20 civilians who took refuge at the base are also killed .
Kerry dispatches Special Envoy Kerry dispatches to Juba . Fighting grows after a reported coup attempt in South Sudan over July . Unknown assailants attack a U.N. base in world 's newest nation . as many as 20 civilians who took refuge at the base are also killed .