The two black boxes recovered from the wreckage of the helicopter crash that killed ex-Sudanese rebel chief and vice president John Garang are being sent to Moscow for analysis.

"A group composed of ourselves (Sudanese), Ugandans and Kenyans will accompany the flight data recorder and cockpit voice recorder retrieved from the helicopter debris to Russia,"said Sudanese investigator Abel Alier.

Suspicion surrounding the July 30th helicopter crash which killed Garang triggered riots that left at least 130 people dead and prompted Sudanese President Omar Al Bashir to promise the publication of the investigation.