The court followed the request of the prosecution to toughen the sentence imposed in January 2007 on Mengistu, who has lived in exile in
Zimbabwe since he was toppled in 1991, after he was found guilty of genocide at the end of a decade-long trial.
But Mengistu, who has lived a life of comfortable exile in Zimbabwe since he was driven from power in 1991, is unlikely to face punishment unless Zimbabwe's President Robert Mugabe loses a run-off election next month.