Thursday’s twin attacks were claimed by the Islamic State Khorasan Province, or IS-K.
While there is a peripheral connection between Islamic State (IS) militants and the Taliban, there are also major differences and IS will present a major security challenge for the incoming Afghan government.
IS accuses the Taliban of abandoning Jihad, and disillusioned members of the Afghan Taliban have defected to the extremist group.
from BBC security correspondent Frank Gardner
In another report (sorry, cannot remember where) it commentated that IS-K was considered a bigger threat than the Taliban.
Very, very worrying....