<span style="color: #222222;">At least 19 people were killed when a bus and a fuel tanker collided in central Iran, state television reported today. </span><br />'' <br />'' <span style="color: #222222;">The collision, which occurred around late yesterday, triggered a fireball that engulfed both the truck and the bus on the motorway between Kashan and Natanz, more than 200 kilometres south of the capital Tehran.</span><br />