Trinamool Congress chief Mamata Banerjee, who has demanded that the prime minister replace Railway minister Dinesh Trivedi with her trusted lieutenant Mukul Roy, on Thursday said no one was above party discipline.

"No one is above party discipline. Dinesh Trivedi did not consult me or Mukul Roy (the party all India general secretary)," party insiders quoted Banerjee telling the Trinamool Congress legislature party meeting ahead of the budget session of the West Bengal legislative assembly.

"Increase in rail fares (will) lead to increase in the people's burden," she said, explaining her stand on Trivedi on Wednesday hiking railway fares across the board in the budget.

Party legislators endorsed the party chief's stand and criticised Trivedi.