IS's Jihadi John threatens slaughter in Britain

Jihadi John, the nickname given to a Briton who beheaded two British and two American nationals abducted by the Islamic State (IS) Sunni radical organisation, has threatened slaughter on the streets of Britain.

Following the release of a threat video by the IS, Prime Minister David Cameron has called an emergency Cobra meeting, the Telegraph reported Monday.

In the video of the murder released Jihadi John threatens to slaughter people on the streets of Britain and termed Cameron as a puppet of US President Barack Obama.

Cameron was briefed on the ongoing situation by security officials while at the G20 summit in Australia.

"The prime minister will chair a meeting of Cobra (Cabinet Office Briefing Room) following the most recent murders perpetrated by IS news of which broke over the weekend. Chairing the Cobra will give him the chance to get the very latest from intelligence and security officials," the prime minister's official spokesman said.

The video featuring the masked militant contains the most explicit threats of attacks on British and American streets.