It is estimated that in 2015, more than a million people crossed the Mediterranean to Europe in search of safety and a better life. 3,770 are known to have died trying to make this journey during the same period. This so-called “migration crisis” is the largest humanitarian disaster to face Europe since the end of World War II.

The latest refugee deaths in the Mediterranean—700 people drowned when the overcrowded fishing vessel in which they were travelling from North Africa capsized of the coast of Libya follows a similar tragedy last week in which 400 people perished.