At least 73 people have been killed and dozens more injured...after fire engulfed a passenger train in central Pakistan.<br />The train was traveling from Karachi to Rawalpindi on Thursday when a blaze ripped through three carriages full of passengers.<br />Officials said the tragedy began when passengers used gas stoves to cook breakfast, violating regulations.<br />Many of the victims died after jumping from the moving train to escape the fire.<br />Pakistan's Prime Minister Imran Khan has ordered an immediate investigation, along with full-scale measures to provide the injured with medical care.<br /><br />
