Italian coast guard ranks recovered the bodies of 13 women who died after a crowded migrant boat capsized in bad weather as rescue craft approached it off the coast of Lampedusa, local authorities said on Monday.

The coast guard said 13 men and nine women survived the sinking of the boat, which was carrying more than 50 people when the disaster struck. Many of the migrants are still not accounted for, including a number of children.

"The boat was in no condition to make the crossing," said Italian magistrate Salvatore Vella, who is investigating the disaster. "It is strange they put to sea in such bad weather."