Muslim 'cyber warriors' take on Islamic State

A group of Indonesian "cyber warriors" sit glued to screens, as they send out messages promoting a moderate form of Islam in the world's most populous Muslim-majority country.

Armed with laptops and smartphones, some 500 members of the Nahdlatul Ulama - one of the world's biggest Muslim organizations - are seeking to counter the Islamic State group's extremist messages.

"We'll never let Islam be hijacked by fools who embrace hate in their heart," tweeted Syafi' Ali, a prominent member of the NU's online army, a typical message to his tens of thousands of followers.