Four civilians were killed and 12 others were wounded on Sunday evening when a car bomb and an explosive device went off in Tuz east of Tikrit.A police source in Salah al-Din told / NINA / that a car bomb exploded today evening at the same time with a roadside bomb near Tuz sewerage office, killing four civilians and 12 others seriously injured.He added that this outcome is preliminary and subject to become higher because of the intensity of the explosion.