RUTHLESS SAS soldiers are said to be on a "kill-not-capture" revenge mission against ISIS after the death of their Brit comrade — and have already taken out a dozen jihadis.

Units with the fabled Who Dares Wins regiment are targeting bomb factories in northern Syria close to where hero Sgt Matt Tonroe, 33, was killed.

The Manchester-born sniper specialist died in a roadside IED blast that also claimed the life of a US Delta Force soldier.

Within hours Special Forces were reportedly back on the ground to hit back at Islamic State fighters in the Manbij area of northern Syria.

And a joint British and US task force has already killed at least a dozen terrorists in a series of night raids since the tragedy, according to the Daily Star.

In one mission, two terrorists were allegedly taken out by SAS snipers as they lay another deadly roadside device.

And a drone strike on an ISIS bomb factory last week killed at least six more Islamist fighters.

A Special Forces source told the paper: "The attacks have been unrelenting – assaults are being launched night and day.

“We’re not giving the terrorists room to breathe or recover. These are kill-not-capture missions."

The source added: "They can run but they can’t hide. If they fight they die.”

A spokesperson for the Ministry of Defence told The Sun Online: "We neither confirm nor deny reports of UK Special Forces activity".

Sgt Tonroe served in 3 Para before joining the SAS. He died alongside Master Sgt Jonathan Dunbar of the elite US Delta Force.

Sgt Tonroe's commanding officer said he "had a steel core, served his country with pride and was a first class soldier, proven in combat, faced risk willingly and was ever ready for more.

"He thus died as he lived: daring and fearless in duty.

"We mourn his loss dearly, are proud to have known him and will honour him by continuing this fight."