NEW DELHI: Four coaches of the Karmabhoomi Express caught fire near Sarai Banjara in Punjab, triggering concern over the incident. The cause of the fire and the extent of the damage are yet to be determined. Further details are awaited.The incident involved four coaches of the train. However, there is no immediate information on what triggered the blaze or whether any passengers were injured.Further details regarding the circumstances surrounding the fire and the damage caused are awaited.(This is a developing story. More information to follow.)