Around 30 Islamic State fighters broke out of a makeshift jail where rival Syrian Islamists had been holding them, a monitoring group said on Friday as it detailed the latest territorial gains by the al Qaeda offshoot.

The insurgents demolished a wall to escape the building – a former school – after fellow Islamic State fighters took control of al-Hawaaj village where al Qaeda loyalists had been holding them, the Syrian Observatory for Human Rights said.

In the same province on Thursday, Islamic State seized control of Syria’s largest oil field from the Nusra Front, al Qaeda’s official wing in Syria, consolidating its position in the eastern Deir al-Zor province bordering Iraq. […]