Prayagraj: Four persons sustained injuries after two rival camps clashed over a petty dispute at Pingari village under Kunda police station in Pratapgarh district on Sunday. Police registered a case under appropriate sections regarding the incident. Reports said two rival groups came at loggerheads over cutting of trees on Sunday morning. When the owner of the field called men for cutting a tree, the supporters of rival camp attacked the owner and his supporters. Four persons from both sides were injured in the scuffle. A team of Kunda police rushed to the spot on being alerted and took the injured to Kunda CHC for treatment. One injured was referred to SRN hospital in Prayagraj, said police officials adding that investigations are on. tnn