Black Watch Suicide Bombing Footage - Zarqawi's Group (Video): Paul Lowe, right, with cousin Barry, left, and brother Craig. Paul was killed two days ago. THE killers of the British hostage Kenneth Bigley last night claimed responsibility for the suicide attack on the Black Watch in Iraq in which three soldiers died. The followers of the Jordanian militant Abu Musab al-Zarqawi said they carried out the bombing on Thursday, according to a statement on an Islamic website. Iraq’s most wanted group made the chilling claim as a bitter political row broke out at home over the regiment’s re-deployment in support of American troops. On a day when the 12-year-old daughter of Sergeant Stuart Gray broke down while laying flowers in her father’s memory there were vitriolic political exchanges, in particular between Geoff Hoon, the Defence Secretary, and the SNP leader, Alex Salmond. The veteran nationalist said "a tide of anger" was sweeping across Scotland, and repeated accusations that the Black Watch’s deployment into the Sunni Triangle near Baghdad had been a political favour to the US president, George Bush. A furious Mr Hoon said Mr Salmond’s remarks "demonstrate clearly there are no depths to which he will not sink", and accused him of trying to score political points over the deaths of Sgt Gray, 31, Private Scott McArdle, 22, and Private Paul Lowe, 19, all from Fife. Meanwhile in Iraq, the Black Watch’s commanding officer, Lieutenant-Colonel James Cowan said that while the regiment was "saddened" over the loss of their comrades in the suicide-bomb attack and ambush, they would "not be deterred from seeing our task through".