At least 15 people were injured as supporters of Gonadhikar Parishad president Nurul Haque Nur and independent candidate Hasan Mamun clashed in Patuakhali-3 (Galachipa-Dashmina) late Saturday night.
The clash took place in front of Chatra Government Primary School in Dakua Union when processions of the two candidates came face-to-face, triggering a confrontation after a verbal dispute.
Three of the injured were admitted to Galachipa Upazila Health Complex, while others received first aid.
Both sides blamed each other for the violence.
Galachipa police officer-in-charge Md. Zillur Rahman said police rushed to the spot and brought the situation under control.
No immediate comments were available from either candidate.