Mr Hazare's protest is aimed against what he regards as a watered-down anti-corruption bill introduced by the Indian government.
Mr Hazare says the government's proposed anti-corruption bill is weak and wants his own tougher version to be passed by parliament.
Indian Prime Minister Manmohan Singh has accused Mr Hazare of trying to circumvent democracy by demanding the overhaul of an anti-corruption bill.
Indian Prime Minister Manmohan Singh has told leaders of political parties that he is committed to finding a consensus on an anti-corruption bill.
In April Manmohan Singh's government caved in to another hunger-striker, Anna Hazare, who extracted a big concession, winning for his supporters a right to co-draft an anti-corruption bill.
In late 2011 Ms Banerjee failed to support both the central government's plans to let foreign supermarkets into India and its latest attempt to pass an anti-corruption bill.
It is also difficult to ignore the fact that unless Mr Hazare and his spirited bunch of aides had not kicked up a storm over a strong anti-corruption bill, India's politicians would never have moved on it with the alacrity they have demonstrated in the past few months.
Recently, Ms Banerjee has opposed Congress on a number of key issues, including petrol price rises, water sharing treaties, retail reform and the anti-corruption Lokpal bill.
India's cabinet has approved some key changes to the controversial anti-corruption Lokpal bill suggested by a committee of MPs from the Rajya Sabha, the upper house of parliament.
Leading anti-corruption campaigner Anna Hazare has been campaigning for a strong bill to be passed in parliament.
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