'Right policy not to pay hostage ransoms' - Cameron

British PM David Cameron and US President Barack Obama have said they will not waver in their determination to confront the Islamic State militants who have murdered two American journalists and are threatening to kill a British hostage.

The two leaders are in Newport in South Wales for a Nato summit which will also focus on the crisis in Ukraine.

Mr Cameron told the BBC: "When a British person is taken hostage... I make sure that every part of government comes together and I supervise this personally to see what we can do."