Baghdad, June 2 (IANS) At least Four people were killed and 41 injured Monday in three separate incidents of car bombings in Iraq, police said. A car bomb detonated at a popular market in the city of Najaf, some 160 km south of Baghdad, left at least two people dead and 20 injured, a local police source told Xinhua. In a**ther incident, two people were killed and nine injured when a booby-trapped car went off at a marketplace in the town of Iskandriyah, some 50 km south of Baghdad, a police official said.