The Pentagon now estimates that ISIS-K in Afghanistan numbers somewhere in the hundreds.
"We don't think it's over 1,000. They hold no meaningful territory in Nangarhar province. There are certainly fighters there but they're mostly spending their time trying to stay alive," said Pentagon Spokesman Navy Capt Jeff Davis.
During an off-camera news conference yesterday, Davis said the killing of ISIS-K leader Abu Sayed in a drone strike last week disrupted it's expansion plans.
"Killed in a kinetic strike on July 11 in Kunar, Abu Syed was the overall ISIS-K Amir in Afghanistan for only six weeks, issuing operational guidance, financial management and acting as the primary decision-maker for operations with ISIS- throughout Afghanistan," he said.
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"His death comes not long after that of his predecessor, Sheikh Abdul Hasib, who was killed by US forces in a raid on April 26 in Achin, Nangarhar province as part of ongoing efforts to defeat ISIS-K in Afghanistan," he added.
"ISIS-K called was formed in January 2015 as a despondent group of several Islamic extremist organizations, loosely organized and committed to supporting the radical ideals of the Islamic State," Davis said, adding that ISIS-K is committed to establishing an Afghan presence on behalf of ISIS and furthering ISIS' Caliphate to the abolition of traditionally recognised sovereign borders.
The Afghan forces partnered with US forces are keeping constant pressure on them.
"We assess that they are most active in Nangarhar, Kunar and Nuristan. We've been putting pressure on them as they try to gain footholds elsewhere," the Pentagon spokesman said.