Islamic State in Afghanistan could have capacity to strike US next year

Pentagon says Afghan-based group and al-Qaida have intention to attack US and Taliban's ability to fight them is to be determined'

The US intelligence community has assessed that Islamic State in Afghanistan could have the capability of attacking the United States in as little as six months - and has the intention to do so, a senior Pentagon official has told Congress.

Colin Kahl, under secretary of defense for policy, also said it was still to be determined" whether the Taliban - which is an enemy of Islamic State - has the ability to fight Islamic State effectively following the US withdrawal in August.