More than 239 migrants are believed drowned in two shipwrecks off the coast of Libya. The UNHCR refugee agency was told the news by two survivors brought ashore on the Italian island of Lampedusa.<br/><br/>No bodies have so far been recovered. More than 4,200 migrants have died making the dangerous journey across the Mediterranean Sea this year. Nearly 330,000 migrants have crossed the sea so far this year.