A crude bomb explosion followed by a chase and counter-chase occurred at Makhati Gurucharan High School in Mollakandi Union of Sadar upazila in Munshiganj.
The incident took place around 11am on Thursday, Munshigan Sadar police station Officer-in-Charge (OC) Md Mominul Islam said.
He said supporters of BNP-backed candidate Kamruzzaman (Sheaf of Paddy symbol) and independent candidate Mohiuddin were involved. However, the OC could not confirm whether anyone was injured.
Sadar upazila Nirbahi Officer (UNO) Masudur Rahman said a minor incident took place at the centre and law enforcement personnel were deployed immediately. Voting is continuing.
Meanwhile, Bangladesh Army Captain Zobayed of the Munshiganj Army Camp told journalists that those involved in the incident have not yet been identified, but efforts are underway to identify the perpetrators.