Media playback is unsupported on your device

What are the options in fight against IS?

22 August 2014 Last updated at 22:41 BST

Foreign Secretary Philip Hammond has ruled out working with Syria's President Assad to defeat the threat from Islamic State (IS) militants.

Former head of the Army Lord Dannatt and ex-Foreign Secretary Sir Malcolm Rifkind called for the move following the beheading of US journalist James Foley by IS militants.

The US has described IS, which has seized large swathes of northern Iraq, as the biggest threat it has faced in recent years.

Jeremy Bowen reports on the options in the fight against IS extremists.

Copyright © 2015 BBC. The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.