According to General John Nicholson, the top US Mission Commander in Afghanistan, ISIS is principally a non-Afghan movement that is completely rejected by the Afghan people, but they are very focused to establish their caliphate inside the country.

In Afghanistan, the main-hub of ISIS militants estimated around 1,000 fighters is in eastern Nangarhar province which shares a border with Pakistan. Nicholson said the US has seen many foreign fighters joining ISIS in Afghanistan, particularly Uzbeks from the Islamic Movement of Uzbekistan and Pashtuns from the Pakistani Taliban.

Nicholson said that the Islamic State Khorasan, or�IS-K, is "completely rejected by the Afghan people," and explained that the broader ISIL philosophy is "the antithesis of Afghan culture."

Insurgents moving across the Afghan border with Pakistan are primarily the Pakistani Taliban, Haqqani Network and ISIS militants.

Nicholson further said that most of the high-profile attacks in Kabul are perpetrated by the Haqqani Network, which operates from across the border in Pakistan.

The Afghan border police are there, but "the number of border posts probably needs to increase," he said, as does coordination between the Afghan and Pakistani security forces.

The Taliban and Haqqani �still enjoy sanctuary in Pakistan,� Nicholson said, adding that they are still able to conduct operations from that sanctuary.

By American Herald Tribune