Migrants from sub-Saharan Africa have been attacked in the Tunisian city of Sfax, with dozens reportedly wounded.

The unrest was triggered by the killing of a Tunisian man on Monday during an altercation with several migrants.

A non-governmental group said that in reprisal attacks, some migrants were thrown from balconies and others attacked with swords.

Women and children were among those targeted.

Witnesses say that dozens have been forced out of the city, which is a key departure point for people seeking to enter the European Union by sailing to the Italian island of Lampedusa.