Congress president Sonia Gandhi's letter to the PM, asking the Centre to ensure suspended Indian Administrative Services (IAS) officer Durga Shakti Nagpal is not "unfairly treated", has posed a threat to her party's plans to pass the Food Security Bill in Parliament. The Samajwadi Party in Uttar Pradesh, which provides crucial outside support to the Congress-led United Progressive Alliance or UPA at the Centre, has been severely criticised over Ms Nagpal's removal, which many allege was due to her staunch action against the state's powerful sand mining mafia. The Akhilesh Yadav government has said Ms Nagpal, the Sub Divisional Magistrate in Gautam Budh Nagar, was suspended for ordering the demolition of a wall that was meant to house a mosque near Greater Noida.