ISIS lost control over central Tikrit following an offensive by the ISF and allied forces with the support of coalition airstrikes. Tikrit was announced captured by the government on April 1, 2015, and PM Abadi, ISF commanders, and local government officials have toured the city center. Since that time, clashes have not been reported in the city and reports that looting of homes is taking place further indicates that combat operations in Tikrit have ceased. The areas immediately surrounding Tikrit likely remain an ISIS attack zone, however.
Iraqi Security Forces, Shi'a militias, and the Popular Mobilization have begun to shell Tikrit. Shelling may disrupt ISIS within the city, making further advances to clear ISIS possible. Shelling will also likely inflict civilian casualties, which may have divisive consequences within the Popular Mobilization.
The role of Iranian-backed militias is introducing an obstacle for the Iraqi Government in its effort to reclaim the territories that fell out of its control. Since the fall of Mosul in 2014, these militias have played a crucial role in retaking areas from ISIS with minimal support from coalition air power and heavy reliance on Iranian support. The lack of precise coalition targeting is for the first time a limiting factor leading Iraqi commanders to halt the operation to retake Tikrit.