A member of the group told reporters they would "peacefully sit on one side of the road", without hindering the movement of vehicles till being allowed to proceed.
The blast took place around 12 noon in Maheva village in the Kokhraj police station area and was heard several kilometres from the factory, the police said.
It will be Modi’s maiden visit to Bihar after Chief Minister Nitish Kumar snapped ties with the grand alliance INDIA bloc and formed a new government with BJP on January 28.
Following the whip, all the candidates will have to show the ballot to the authorised agent who can declare a vote invalid if any MLA refuses to show the ballot.
On Sunday, she took to social media platform X to share her ordeal and said that after she was detained at the airport in a holding cell for 24 hours, she was deported to London.