Defence Secretary Chuck Hagel says this is not military intervention but an effort to assist Iraqi forces.
Isis brainwashing people with female vigilante squads and 'Osama bin Laden Cub Camps'
Maliki says Fuad Masoum's decision to name new PM is violation of constitution.
Nouri al-Maliki amasses troops in Baghdad in show of force against Iraqi president Fuad Masoum.
Renewed strikes target Islamists' armoured vehicles as Obama vows America's long-term commitment.
US president's decision reportedly came in wake of growing threat to Washington's interests in Erbil and Baghdad.
Defence Secretary Michael Fallon set to hold emergency Cobra meeting over worsening situation in Iraq.
Islamic militants quietly developing capabilities on southern outskirts of Iraqi capital.
Islamist militants also capture fourth oil field and three towns overrunning unopposed Kurdish forces.
A former Raqqa resident tells us about the pain, agony and humiliation of living under Isis rule.
Iraq requests UN help to prevent the threat of terrorists in Iraq or abroad using the materials.
Sunni insurgent leader, injured by Iraq's Shiite-led security forces in west of Anbar, said to be in critical condition.
Insurgents planning Baghdad assault with aid of insider uprising at 'Zero Hour'
Fierce fighting between Shiite and Sunni forces rages in Iraq on eve of Ramadan.
Manned and unmanned reconnaissance jets fly over Iraqi capital following deployment of US advisers.
Isis insurgents attack al-Bakr airfield in Yathrib as Prime Minister Maliki rules out unity government.
US teams comprising intelligence analysts and commandos begin assessing Iraqi situation.
Exclusive: Indian Islamic outfit seeks permission to send 4,000 volunteer fighters to Iraq to battle Isis insurgents.
Sunni insurgents take complete control of refinery in Salahuddin which supplies most of Iraq's domestic fuel consumption.
Shiite Iran's top cleric says US using sectarian divide in Iraq as ruse for re-occupying country.
Former vice-president Adel Abdul-Mahdi and former premier Ayad Allawi among those tipped to replace al-Maliki.
Kurds roar 'Isis can beat Maliki, but they can't beat us'