article_snippet: Shia fighters fire fighters weapons during clashes with Islamic State militants near Tikrit yesterday .
article_snippet: Rockets are fired from the back of Shia vehicles as Shia vehicles engage Islamic State terrorists near Tikrit .
article_snippet: Shia fighters hide behind sandbags while fighting Islamic State militants near Tikrit yesterday afternoon .
article_snippet: An armed Shia fighter takes up An armed Shia fighter position during clashes with Islamic State militants close to Tikrit .