Shiite opposition
Iran reacts with fury after Saudis execute Shi'ite cleric
Pictures were tweeted that showed parts of the interior on fire and smashed furniture inside one office.
Army sources said a tribal alliance took control of the bases in Shihr and Riyan.
Leaders insist the Islamic State must never be allowed to strike them again.
Officer Mohammed Atiq al-Jehani was shot and wounded by unknown assailants.
Gunmen opened fire and killed three people, including a senior military official.
Baghdad said it wanted US air strikes on insurgents led by fighters from the Islamic State of Iraq.
Insurgence overran the city of Tikrit on Wednesday and closed in on the biggest oil refinery in the country.
Two suicide bombers targeted Shi'ite Muslims in Iraq on Saturday, killing 60 people.
Syrian rebels attacked civilians and intercepted Assad’s plan to recruit more fighters for his campaign.
At least 11 people were killed when three car bombs exploded in public markets early on Monday.
A suicide bomber killed at least 20 people inside a Shi'ite mosque in northern Iraq.