The Iraqi army has been trying over the past three days to break through a seige of Iraq's biggest oil refinery. The Islamic State in Iraq and Levant (ISIL) captured the city in June, stopping production at the facility.

Since then, fighters have been using desperate tactics, including suicide bombers, carbombs and snipers, to hold onto control.

Al Jazeera's Imran Khan has this exclusive report. 

Source: Al Jazeera