Twenty six people, including two children, were killed and 12 injured when a fire broke out in the AC 3-tier. B-1 coach of the Bangalore-Nanded Express train at Kothacheruvu near Puttaparthi in the early hours of Saturday. While the Commissioner of Railway Safety will formally probe the incident, a preliminary inquiry by Railways is learnt to have ruled out short-circuit and indicated the presence of a "foreign object" which could have started the fire.