Nouri al-Maliki's comments came as ISIS 'seized control of 75% of Iraq's largest oil refinery'
But Iraqi government denied plant had been taken, saying 50 to 60 militants had been killed in fierce fighting
Iraqi troops say they have repelled an attack by ISIS on the country's largest oil refinery, killing 40 militants
Car bomb blast kills 12 and injures 30 in Baghdad as Islamist fanatics plan wave of terror attacks on the capital
Pentagon says Iraqi troops are now 'stiffening their resistance' around Baghdad with the help of Shi'ite volunteers
Gulf security expert believes ISIS have 'no real aspiration' to take the capital but will instead aim to 'cause havoc'
Dr David Roberts said: 'They are crazy in one sense, but have thus far been making intelligent strategic decisions'
Obama not expected to approve imminent air strikes, partly because there are few clear targets to curb offensive
ISIS militants are offering a rough travel guide for would-be jihadists in an attempt to recruit young Britons to Iraq
Thousands of volunteers in neighboring Iran have signed up to defend Shi'ite shrines under threat from ISIS
David Cameron says Britain must take a long-term approach to intervening in the Iraq crisis
Afghan president Hamid Karzai dismisses the idea of an Iraq-style al-Qaeda comeback in Afghanistan