New Delhi, Dec 05 (ANI): Social activist Anna Hazare said on Thursday that he will begin an indefinite hunger strike from Tuesday to demand that Parliament urgently clears the anti-corruption Lokpal Bill. Hazare said that he had written to the Prime Minister Manmohan Singh saying that his government had given him false assurances. In August 2011, Anna fasted for 16 days at Delhi's Ram Lila Maidan, for the anti graft bill, drawing thousands of people.