Candidate for Congress KN Tripathi allegedly brandished a pistol after his supporters clashed with BJP candidate Alok Chaurasiya at a polling booth in the Daltonganj assembly constituency of Jharkhand on Saturday morning, official said. The clash took place at the polling booth of Koshiyara in Palamu district's Chainpur block of Daltonganj assembly constituency. In another incident of violence, soon after the vote began in the first phase of polls in Jharkhand, Maoists blew a culvert on the border between Gumla and Lohardaga. However, no casualty was reported and election officials claimed that the poll process was unaffected by the incident.