"Return, or prison," that's the ultimatum that Minister of Migration Thanos Plevris has given to what he calls "illegal migrants" in Greece.

But who are these migrants actually? And how does the International Organisation of Migration (IOM) stand to benefit from this threat?

Hope Barker, Anas Ambri and Phevos Simeonidis investigate.

The production of this investigation is supported by a grant from the IJ4EU fund. The International Press Institute (IPI), the European Journalism Centre (EJC), and any other partners in the IJ4EU fund are not responsible for the content published and any use made out of it.