(WARNING: GRAPHIC CONTENT) Amateur video, which Reuters cannot independently verify, purports to show Islamic State fighters targeting Syrian regime sites around Deir al-Zor military airport. Vanessa Johnston reports.
*** EDIT CONTAINS GRAPHIC CONTENT *** Amateur videos posted online purport to show Islamic State militants and Syrian regime forces battling for control of a military air base around Deir al-Zor province. It's one of the last strongholds in the east for Syrian President Bashar al-Assad's government. Islamic State controls all but a few pockets in the province, whose oilfields have been a major source of revenue for the group. But its operations have come under strain in recent months... ...ever since a U.S.-led coalition came into the mix and started launching air strikes against them. The latest battle between Islamic State and Syrian forces comes as a mass grave was revealed in Deir al-Zor province. The Syrian Observatory for Human Rights says it contains the bodies of more than 230 people killed by Islamic State.