The seat fell vacant after Union minister L Murugan resigned from the Rajya Sabha on October 13. Union Petroleum and Natural Gas Minister Hardeep Singh Puri filed his nomination for the Rajya Sabha by-election from Madhya Pradesh on Saturday, in the presence of Chief Minister Mohan Yadav,. Union Minister Hardeep Singh Puri filed his Rajya Sabha nomination in Bhopal after visiting a gurdwara and Karuna Dham Ashram.