At least 80 migrants are feared dead after a boat capsized off the coast of Tunisia.Four people were rescued from the inflatable vessel which sank in waters near the town of Zarzis but one died later in hospital.

The country is a main departure point for migrants hoping to reach Europe.The four who were rescued survived by holding onto some wood that they had extracted from the boat.

Libya has been torn by violence and division since long-time ruler Muammar Gaddafi was deposed and killed in 2011.

Thousands of migrants, many from Sub-Saharan Africa, are being held in detention camps in the country.

At least 53 migrants were also killed last Wednesday when a detention centre in Tripoli was hit by an air strike.