CHARSADDA: A policeman was injured as unidentified gunmen opened fire on a population census team in Tangi area of Charsadda district. Sources said that unidentified motorcyclists opened indiscriminate firing on population census team as they were performing duties near Harri Chand. As a result, one policeman sustained injuries. Police retaliated and arrested the attacker in injured condition. The suspect was shifted him to an undisclosed location for further interrogation. Police said the accused hailed from Malakand Agency. It is pertinent to mention here that sixth population census is underway across the country since March 15. The first phase of the census will be completed by April 23 while the second phase will start from April 25 and will end on May 25.