Militants at former US base in Tikrit
The advance through Iraq of the Islamist militant group ISIS continues to cause alarm in Baghdad and beyond.
The Iraqi government insists it has a plan to defend the city, and the country's most senior Shia cleric has urged people to take up arms against the insurgents.
The UN says hundreds have been killed - with militants carrying out summary executions of civilians in Mosul.
Nick Childs reports.
- From the section Middle East