Whoever hired the workers should be responsible for what happened to the workers given there wasn't even potable water available for them to drink - could this be Al Qaeda?
Around 4% of gems on the world market are classed as "conflict
diamonds".
"We can make an impact on conflict diamonds... and prevent the
dreadful scenes we saw in Sierra Leone. We need to protect a
legitimate industry which employs huge numbers of people,"
added Mr Wright. <<<<<<<
From your link.
There is a very good chance that the miners are mining for
al Qaeda.
More than likely they are captives in the wars by the muslims, who like to wipe out whole villages.