'I was driven to join IS through hunger'

So-called Islamic State (IS) has lost thousands of fighters over the past year - most to attacks, others to desertion and some captured by opposing forces.

Here, Abu-Omar al-Iraqi (not his real name), one of 10 IS members held by rebel group Ahrar al-Sharqiya north-east of Aleppo, tells BBC radio's Today programme why he joined the jihadists.