Death toll in Samarra for June nearly twice that of May . U.S. official tells Pentagon that potential threat from ISIS prompted troop escalation . CNN sending 300 more troops to Iraq as protection forces . CNN could n't independently confirm the different claims . Imam Ali al-Hadi rounds strike gate of holy site in Samarra .
Death toll in Samarra for June nearly twice that of May . U.S. official tells Pentagon that potential threat from ISIS prompted troop escalation . CNN sending 300 more troops to Iraq as protection forces . Imam Ali al-Hadi rounds strike gate of holy site in Samarra .