Over 5000 Melar tribals brandished traditional weapons at the halt between Jamtara and Chittaranjan railway stations since 5 AM demanding that they be included in the primitive tribals list, they said.
The Jan Shatabdi, Howrah-Gorakhpur and several other trains were stranded at various points as a result of the demonstration, railway sources said.
Senior police officials were at the spot to convince the tribals to remove the blockade.