In 2013 , the organization 's Missing Migrants Project estimated the total for the year to be 700 deaths . U.N. human rights chief urges probe into alleged deliberate sinking of a packed migrant boat . The incident occurred in the Mediterranean Sea on Saturday when migrants tried to cross from Turkey to Greece by boat. Survivor tells of people smugglers laughing as they rammed the boat , watched it sink . Children are among as many as 500 people feared dead ; 11 survivors have been found .
U.N. human rights chief urges probe into alleged deliberate sinking of a packed migrant boat . The incident occurred in the Mediterranean Sea on Saturday when migrants tried to cross from Turkey to Greece by boat. Survivor tells of people smugglers laughing as they rammed the boat , watched it sink . Children are among as many as 500 people feared dead ; 11 survivors have been found .