A ruthless, sniffer dog was among American Special Forces that stormed Osama Bin Laden's secret refuge in Pakistan, it was revealed last night.

The explosive-sniffing dog was strapped to an assault team member as they took on one of their greatest challenges to date, London's Sun newspaper said.

He was part of the operation in which the elite US Navy Seals lowered themselves down ropes from three Black Hawk helicopters into the terrorist supremo's hideout in the town of Abbottabad, Pakistan, on Sunday.

The world's most wanted man, 54, was shot dead by a Special Forces marksman during the raid.

Heavily armoured hounds — equipped with infrared night-sight cameras — have been used in the past by the top-secret unit.

The war dogs wear ballistic body armour that is said to withstand damage from single and double-edged knives, as well as protective gear which shields them from shrapnel and gunfire.

German Shepherds have been leading the way in SAS raids in Iraq and Afghanistan.

Wearing oxygen masks, the pooches have been trained to jump from aircraft at 25,000ft, before seeking out insurgents in hostile environments.

The animals will attack anyone carrying a weapon and have become a pivotal part of special operations as they crawl unnoticed into tunnels or rooms to hunt for enemy combatants.

The cameras on their heads beam live TV pictures back to the troops, providing them with critical information and warning of ambushes.

Dogs were also used in the capture of Saddam Hussein and in the killing of the Iraqi dictator's two sons.