Party State Secretary Kodiyeri Balakrishnan told reporters here that this step by Railways had led to hardships for the passengers.
He demanded that the Chief Minister immediately intervene on the matter and alleged that it was an 'open challenge' by the Railway towards commuters.
CPI(M) veteran and Opposition leader V S Achuthanandan requested the Railways to reconsider the decision and withdraw the order.
Only ordinary tickets will henceforth be issued.
Earlier, passengers were issued sleeper class tickets in long distance trains to travel during daytime.
