After the Planning Commission, it's now turn of the Prime Minister Manmohan Singh to write a letter to Chief Minister Sheila Dikshit seeking clarifications on the allegations made by the Left parties about the interference of the World Bank in the implementation of the 24x7 water supply project of the Delhi Jal Board. Well-placed sources said that Mr Singh has sought queries on the complaints came from Left parties and Parivartan, a non-governmental organisation (NGO) on the basis of documents submitted by them of the 24x7 water supply plans.