A BRITISH army sniper once killed six terrorists with a single bullet from one of the Army’s most powerful guns.

The unidentified marksman, a Lance Corporal in the Coldstream Guards, hit the target from 930 yards (850 metres) away while in Kakaran in southern Afghanistan.

2 The unidentified marksmen fired the bullet from 930 yards (850 metres) away Credit: Reuters

All six terrorists were killed after a single bullet hit the trigger of a suicide bomber’s vest, which exploded killing everyone around him, The Daily Telegraph reported.

It is understood the marksman, who was 20 at the time, was using an L115A3 gun, which is one of the most powerful sniper weapons.

Lt Col Richard Slack, commanding officer of the 9/12 Royal Lancers, explained how the shot happened in December 2013 when hundreds of British and Afghan soldiers were in a gun battle with 15 to 20 insurgents.

He said in March 2014: “The guy was wearing a vest. He was identified by the sniper moving down a tree line and coming up over a ditch.

2 The bullet was fired during a battle between British and Afghan soldiers and terrorists Credit: PA:Press Association

“He had a shawl on. It rose up and the sniper saw he had a machine gun.

“They were in contact and he was moving to a firing position. The sniper engaged him and the guy exploded.

“There was a pause on the radio and the sniper said, 'I think I’ve just shot a suicide bomber’. The rest of them were killed in the blast.”

The vest was said to have had 44 pounds (20 kilos) of explosives in it.

It was reported that with the sniper’s first shot on that tour of duty he killed a Taliban machine-gunner from 1,465 yards (1,340m).

Video of the incredible moment a sniper bullet hits a US Marine on the helmet during a helicopter raid in Helmand Province, Afghanistan in 2013

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The six-man shot reportedly foiled a large-scale coordinated suicide attack after a second explosive vest was discovered nearby.

The UK withdrew all their combat operations in Afghanistan and the last of its troops in October 2014.

Between 2001 and 2015, a total 454 British military personnel died in operations in Afghanistan.

Dramatic video of moment Sun team were pinned down in Afghan badland known as 'Sniper Alley'

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