LAKKI MARWAT, Sept 4: A man was seriously injured when two groups of people exchanged fire in Khoidadkhel area here on Sunday. Police said that supporters of PML-N, led by Naimat, and those of the ruling PML group, led by Zainuddin, opened fire on each other, causing injuries to one Mohammad Raza, who was wanted by the police in a murder case. The police rushed to the area and arrested Mohammad Raza. Cases have been registered against the two groups.