PESHAWAR, May 31 (APP): At least four persons were killed and two others injured during an exchange of firing over money dispute in Charsadda district on Friday, police said.The incident occurred at village Turangzai in the limits of Umarzai police station where a dispute between Yousaf and Riaz was developed on return of loan.Police said Yousaf along with his supporters allegedly attacked the house of Riaz, killing his son, two daughters on the spot while Riaz and his wife sustained critical bullets wounds and was hospitalized.Due to indiscriminate firing, Abdul Qadoos from the other group was also killed.Police had registered case and started investigation. 