A passenger train with 22 carriages carrying about 1,000 people became detached from its engine and sped backwards for miles before being stopped, said India’s railway ministry. The runaway carriages rolled for seven miles in the eastern state of Odisha before being brought to a shuddering halt by rocks placed on the tracks by railway staff. Authorities believe that brakes normally applied when carriages are detached or attached to an engine were either incorrectly used or overlooked altogether.