The incident took place on March 11 during the election to the Vice President's and President's posts of the Koppala city municipality, Koppala Superintendent of Police K Thiayagarjan told PTI here.
"JDS member Channabasappa Kothihal in a fit of anger slapped the independent woman member Vijaya Hiremath for not raising the hand in support of BJP candidate," he said.
A day before, on March 10, the woman councillor had decided to vote for the BJP candidate, but changed her stance, which angered Kothihal and in a fit anger slapped her in full public view, Thiayagarajan said.
The incident captured in a video footage has gone viral on the social media prompting many prominent JDS leaders to condemn the attack.
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JDS leader Danish Ali condemned the assault and assured strict action against Kothihal. "We condemn such ugly act ....Also do not approve it. Such things are not allowed in a civilised society," he said.
Vijaya had registered a complaint against Kothihal for assault and outraging the modesty of woman, Thiayagarajan said.
The accused is absconding and the police are searching for him, he added.
However, Kothihal has filed a counter complaint against Vijaya alleging that it was she who first abused him and beat him up, before he slapped her, Thiayagarajan said.