A U.N. report says more than 6,000 Pakistani insurgents, most belonging to the outlawed Tehreek-e-Taliban Pakistan (TTP) group attacking Pakistani military and civilian targets, are hiding in Afghanistan. The report released this week said the organization has linked up with the Afghan-based Islamic State affiliate and some of its members have even joined the IS group, which has its headquarters in eastern Afghanistan. The Afghan government did not respond to The Associated Press requests Sunday for comment.