The 14 September 2005 Baghdad bombing occurred when a suicide car bomber detonated his vehicle in a crowd of construction workers who had gathered in Baghdad's Oruba Square looking for jobs. The attack, which occurred in the mainly Shia district of Kadhimiya, killed 112 people, and injured 160. Al-Qaeda in Iraq claimed that the bombing was in retaliation for a recent offensive against the Iraqi insurgency, but the groups leader Abu Musab al-Zarqawi released an audio tape on the same day declaring war against Shias in Iraq.