Just How Many ISIS Fighters Are There in Afghanistan?

Just How Many ISIS Fighters Are There in Afghanistan? | The Diplomat: 
In late December 2014, the Russian official noted that local fighters loyal to ISIS – whose spillover into Central Asia was “inevitable” – had established a pair of “beachheads” in Afghanistan, alongside the borders with Tajikistan and Turkmenistan. Per Kabulov, these two contingents totaled upwards of 7,500 fighters – far more than the “hundreds” the official now says existed some 12 months ago. RT further writes that Kabulov had estimated the ISIS fighters in Afghanistan at 3,500 last October, adding to the confusion.