Those who broadcasted this are requested to tarvel to Narayanpura ,Karachi and tell the same to the residents.
i would say try telling them :) .
i condemn this if it has came from radio pakistan although source is weak, i suspect it would be true.
as for black magicians they are every where even heard a gory news on news channel related to this in khi few weeks back couldnt sleep for hours and news channel took it back never ran it again.
so blaming Kaali for what blackmagician do is like blaming islam for what alqada or baitullah mehsud did.