<br/> Iraqi forces drove back Islamic State militants in southeastern Mosul on Thursday, making gains in an area where advances have been particularly tough. <br/><br/> As per military officials, rapid response units from Iraq's federal police advanced in the Sumer district, which lies on the eastern bank of the Tigris river and also in neighbouring Sahiroun. It said, the army's elite Counter Terrorism Service (CTS), has spearheaded advances in eastern Mosul.