ROUGH CUT (NO REPORTER NARRATION)<br/> <br />STORY: A bomb blast killed at least three soldiers and two civilians in the Pakistani city of Quetta on Wednesday and security officials said the death toll was likely to rise.<br/> <br />The bomb, attached to a motorcycle, exploded near a security vehicle escorting school children, officials said.<br/> <br />Sixteen people were wounded in the blast.<br/> <br />Police and paramilitary forces cordoned off the area following the blast and the injured were transported to a military hospital. A Reuters reporter saw the corpses of three soldiers under the vehicle as it burned.<br/> <br />There was no immediate claim of responsibility for the attack in Baluchistan, Pakistan's biggest but poorest province which borders Afghanistan and Iran and where several militant groups are active.