Bhopal (Madhya Pradesh): Union Minister and BJP's Rajya Sabha candidate Hardeep Singh Puri filed his nomination papers in Bhopal on Saturday in the presence of Chief Minister Mohan Yadav and other senior party leaders. The by-election is being held to fill the seat vacated by Union Minister L Murugan's resignation.Puri filed his nomination before the Returning Officer at the Madhya Pradesh Legislative Assembly at around 11:30 am.