The maoists targeted the train between Pipra and Jeevdhara, around 200 km from Patna.
"The goods train driver and guard informed us that suspected Maoists set afire an oil tanker. After that fire spread to other tankers," informed Dilip Kumar, the east central railway chief public relation officer, over the phone.
"The fire is massive and we will have to wait for the fuel to burn out," said a police officer.
As the main track has been barred, he train services have been disturbed in North Bihar, says the railway officials.