A suicide bomber struck an Iraqi position on the border with Saudi Arabia, killing six guards, officials said Saturday, an attack claimed by the Islamic State group. The bomber detonated an explosives-rigged truck at a border post in Iraq's vast Anbar province on Friday and also wounded 14 guards, an army lieutenant colonel and a local official said. IS issued a statement claiming the attack, which it said was carried out by a bomber identified as Abu Ali al-Ansari.