The UN Security Council is expressing its “deep outrage” at the killings, rapes and torture by the Islamic State.
The Islamic State group wanted to send a warning against anyone who might plot against its rule.
Thousands of cheering, flag-waving people gave a noisy send-off to a group of Iraqi Kurdish peshmerga troops.
Iraqi government forces and Shi’ite militias took control of the strategic town of Jurf al-Sakhar.
The Islamic State jihadist group has again surrounded Mount Sinjar in northern Iraq.
Senior US officials are considering an Iraqi request for more American military advisers.
Spain will begin training Iraqi forces later this year to battle Islamic State fighters.
Congratulating Iraq, US Secretary of State John Kerry said it was a “very positive step forward”.
Six airstrikes took place near Kobani in Syria where reports indicate they successfully struck three IS buildings.
The heavily guarded capital has been under nearly daily attacks by Sunni militants who have overrun vast areas in western and northern Iraq since early this year.
Pins bearing the militants’ black-and-white flag are on sale at a jihad-themed bookstore near the Istanbul University campus.
IS poured in reinforcements and fired at least 11 rocket-propelled grenades into the town centre, said the Britain-based monitoring group.
The attack took place in Qara Tappah, in the eastern Diyala province about 120 kilometers (75 miles) northeast of Baghdad.
A group that monitors the Syrian civil war said the Kurdish forces faced inevitable defeat in Kobani.
The motion authorizes air strikes in Iraq for up to six months and explicitly states that no ground troops be used in combat operations.