TUNIS (Reuters) - At least 48 migrants were killed when their boat sank off Tunisia’s coast and 67 others were rescued by the coast guard, officials said on Sunday, one of the worst migrant boat accidents in recent years. The boat went down near the southern island of Kerkenna, a tourist spot, in the night to Sunday, the defense ministry said in a statement. The victims were Tunisians and other nationalities, it said, without giving details.