Korba will witness polling tomorrow in the third phase for which campaigning concluded on Tuesday evening.
The incident, which took place last night, left three BJP workers and a Congressman injured.
According to Korba Superintendent of Police, Amresh Mishra, the clashes broke out between BJP as well as Congress leaders and their supporters in Baghapani village area under Rampur assembly constituency in the district over alleged illegal means of wooing voters in the area.
Congress workers allegedly thrashed BJP men and also damaged their vehicles. Three BJP workers and a Congressman were also injured in the brawl and were admitted to a local hospital, police said.
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Later, BJP workers lodged a complaint against Rai, another Congress MLA from Rampur, Shyamlal Kanwar and 20 other Congress workers.
After investigation, Kanwar's involvement was not found in the case, and hence no action was taken against him while Rai was arrested today, the SP said, adding others are yet to be apprehended.
Meanwhile, former Home Minister and senior BJP leader Nankiram Kanwar has denied the allegations of distributing money or other material among people in the poll bound region.