In a notification, the Home Ministry said the central government has received credible information that a terrorist module is planning attacks in different parts of India.
It is learnt that the said module has visited various places in India to identify possible targets for terror attacks.
"There is further credible information that the said module carried out low intensity combustible blasts in railway coaches in Odisha and other places which resulted in fire in some coaches," the notification said.
The low intensity explosion took place in three express trains at Puri railway station in Odisha on November 12 leading to fire and damage to at least four bogies.
The damaged trains were New Delhi-Puri Nandankanan Express, Puri-Tirupati Express and Puri-Howrah Express.