Three persons including a policeman were injured during a clash between cadres of CPN-UML and CPN(Maoist Center) in Hariwan of Sarlahi on Saturday. The clash ensued after a dispute over contract of Fish Market in Hariwan went political. According to police, lately in Hariwan tensions are being caused due to politicization of all issues. The injured in the incident are Manoj Baitha and Nursaba Khatun. Similarly, policeman Kasim Miya Dhobi also sustained injury after being hit with stone on his head.