The development came against the backdrop of the ruling party accusing the BJP of trying to poach its MLAs to topple the Kamal Nath-led government which enjoys a wafer thin majority in the House.
Media experts are racking their brains over what could have led to a dismal show of the grand old party in the state.
The worst part for the Rahul Gandhi-led Congress is that apart from the huge defeat in the state, all its top leaders have lost the polls.
The demand for floor test comes in less than 24 hours after exit poll predictions assumes significance in more than one way.
Whatever will be the outcome on May 23, exit polls forced observers to have a re-look over the possible reasons which may upset Congress calculation.
The incident took place sometime before the polling for the Indore Lok Sabha seat came to an end, police said.
In the 2014 Lok Sabha polls, the BJP had won 27 seats in the state.
Senior BJP leaders acknowledged anger among grass-root workers of the party for giving ticket to an outsider.
Polling is also being held in the second of the three phases in Jammu and Kashmir's troubled Anantnag constituency.
The former chief minister was referring to the Modi government's flagship 'Smart Cities Mission', which is aimed at developing 100 smart cities, including Bhopal, in the country.