Two Iraqi traffic policemen were injured here on Thursday when an explosive device went off east of the capital, a local security source said.The police patrol was attacked in Al-Habeba district, in Al-Sadr city, causing material damage to the vehicle, the source told KUNA.Security forces condoned off the scene, while the wounded policemen were transferred to Al-Kandi Hospital.A traffic policeman was shot by gunmen in Al-Bayya\' region south west of Baghdad.Another three traffic policemen were injured in an bomb attack in Za\'faraneya, southeast of Baghdad.A group of gunmen killed an Iraqi policeman with a hand grenade while on his way back from work.One of the outlawed Al-Sahwa group members was killed yesterday in a booby-trapped car blast in Al-Amereya region west of Baghdad, while two persons accompanying him were injured.Policemen and police facilities have come under a series of attacks since the start of this week.