(ANSAmed) - TUNIS, 30 GEN - At least 13 people are missing at sea after Tunisian coast guards rescued in the night between January 28 and 29 a reported 24 migrants who were on a boat that sank off the coast of Louata, in the governorate of Sfax, according to a spokesman of the local National guard. In a statement, the National guard said an operation is ongoing to search for missing passengers. The same source added that the rescued people said they are from several countries of sub-Saharan Africa. (ANSAmed).