BUJUMBURA, March 15 (Reuters) - Burundi has arrested eight people found with human bones suspected of belonging to albinos, a government official said on Sunday. The tiny east African nation and neighbouring Tanzania have been convulsed by a spate of ritual albino murders fuelled by a body parts trade. Witchdoctors tell clients that albino parts will bring them luck in love, life and business. "Before arresting them, we did a search and found human bones in their houses," said Nicodeme Gahimbare, a public prosecutor in the eastern Ruyigi province. "The eight were denounced by two other detained people who have...