the third reason which been mentioned is existence of islamic probably most prevalent in forgana valley have also been the source of problems
The third reason which, unfortunately, has not been mentioned yet, is the existence of radicalised extremist Islamic groups, probably most prevalent in the Fergana Valley, which have also been the source of various problems.
The third reason which, been mentioned is existence of Islamic probably most prevalent in Fergana Valley, have also been the source of problems.