Six people were killed and eight wounded when a roadside bomb exploded and hit a small truck carrying workers in the western outskirts of Baghdad on Saturday, police and medical sources said. "It was a roadside bomb that went off near a pick-up carrying construction workers in Zobaa village west of Abu Ghraib," said a police source who asked not to be named. A medical source at the nearby hospital in Falluja said they had received six dead bodies and eight wounded. Abu Ghraib was once one of the most volatile areas in Iraq and was used by al-Qaeda fighters as a safe haven during the peak of sectarian fighting in Iraq in 2006-2007.