Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. UN: Thousands of Anti-Pakistan Militants in Afghanistan Associated Press ISLAMABAD - 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. The report said the IS in Afghanistan, known as IS in Khorasan province, has been hit hard by the Afghan Security Forces, as well as U.S. and NATO forces and even on occasion by the Taliban. The report was prepared by the U.N. analytical and sanctions monitoring team, which tracks terrorist groups around the world. The report estimated the membership of the Islamic State affiliate in Afghanistan at 2,200 and while its leadership has been depleted it still counts among its leaders a Syrian national Abu Said Mohammad al-Khorasani. The report also said the monitoring team had received information that two senior Islamic State commanders, Abu Qutaibah and Abu Hajar al-Iraqi, had recently arrived in Afghanistan from the Middle East. "Although in territorial retreat, [the Islamic State]remains capable of carrying out high-profile attacks in various parts of the country, including Kabul. It also aims to attract Taliban fighters who oppose the agreement with the United States," said the report referring to a U.S. peace deal signed with the Taliban in February. .