An estimated 50,000 people are likely to be displaced by the Sudanese government's proposed Merowe Dam on the River Nile

The government says it is an essential project to counter an acute power shortage. But the Nubian tribe of northern Sudan, who live in the path of the dam project, think differently.

Nearly 50 years ago, dam construction on the Egyptian border wiped out a centuries old way of life.

Mohammed Vall went to northern Sudan, where inhabitants say they are once again under threat.