Libyan border guards have rescued dozens of migrants who have been left in the desert by Tunisian authorities without water and food, and their numbers are "rising," a Libyan officer said Sunday. "I asked: where are you taking us? They say they want to throw us in Libya. But what did we do to be sent to Libya? They said: We don't need you here in Tunisia," said Abu, a migrant from Ivory Coast. Following racial unrest in early July in Sfax, Tunisia's second-largest city, hundreds of migrants from sub-Saharan African countries were forcibly taken to desert and hostile areas bordering Tunisia, Libya and Algeria.