Evros is a river and it is the natural border with Turkey in the north-east of Greece. Lots of immigrants, while they are trying to get into Europe, they are coming through Evros river.There, because Greece and Turkey are like enemies, we have lots of mines so lots of immigrants are getting killed while they try to enter.
The river of Evros is not very friendly and therefore, while they are trying to swim across, they are getting drowned.It is believed that between 150 and 200 corpses have been buried in the mass grave and  
although most of them are Muslims, because most of them are  from Afghanistan and Iraq, they don’t get buried  properly and only a sign writing “mass grave of illegal immigrants ” is there plus the sign is full of bullets
So this is Greece, this is European Union, this is capitalism, this is a war and
we are gonna get revenge.
from  here  http://w2eu.net/2010/08/09/mass-grave-of-refugees-in-evros-uncovered/